Color Palette
Generate harmonious color palettes randomly or build your own with the color picker. Supports complementary, triadic, and analogous harmony rules. Copy HEX and RGB values with one click.
Key features
- Generate random harmonious palettes instantly
- Pick individual colors with an intuitive color picker
- One-click copy of HEX and RGB values
- Save and manage your custom palettes easily
Guide
Choosing colors for a website, app, or brand is one of the first decisions you make in any design project. It is also one of the decisions that sticks with you the longest, because changing your color palette after you have built out dozens of pages and components is painful. A color palette generator helps you get this right from the start by producing sets of colors that work together based on proven color theory principles. Color theory is not abstract art school knowledge. It is a practical framework built on the color wheel that Isaac Newton first described in the 1600s. When you pick colors from specific positions on the wheel, they create predictable visual relationships that humans find pleasing. These relationships have names: complementary, analogous, triadic, split-complementary, tetradic, and monochromatic. A good palette generator applies these rules automatically so you do not need to memorize any of them. Complementary palettes use two colors that sit directly opposite each other on the color wheel. Blue and orange is a classic example. These palettes have high contrast and create visual energy, making them good for call-to-action buttons, alert messages, or any element that needs to stand out. The risk with complementary colors is that using them in equal amounts can feel aggressive. Apply the 60-30-10 rule: 60% dominant color, 30% secondary, and 10% accent. This ratio prevents one color from overwhelming the other and gives your layout a sense of visual balance. Analogous palettes use colors that sit next to each other on the wheel. Think of the range from yellow through green, or from blue through purple. These palettes feel harmonious and natural because the colors share underlying hues. They work well for backgrounds, nature-themed designs, and any interface where you want a calm, cohesive feel. The downside is low contrast, so you may need to add a neutral or a distant accent to create focal points. A travel blog using teal, cyan, and seafoam green creates a relaxing ocean vibe, but you will want a warm coral or sandy beige for buttons and calls to action so they do not disappear into the background. Triadic palettes use three colors evenly spaced around the wheel, forming a triangle. Red, yellow, and blue is the simplest triadic set. These palettes are vibrant and balanced, giving you enough variety to differentiate sections and elements while still feeling coordinated. Triadic schemes are popular in children's products, sports brands, and playful UI designs. When using triadic colors in a professional context, desaturate two of the three colors and let one remain vivid as the primary accent. This tones down the playfulness while keeping the visual variety. Split-complementary palettes take one base color and pair it with the two colors adjacent to its complement. If your base is blue, instead of pairing it with orange (the complement), you pair it with red-orange and yellow-orange. This gives you the contrast of a complementary scheme but with more nuance and less visual tension. It is one of the easiest palettes to work with because it is hard to make it look bad. Designers who are unsure about color theory often find split-complementary to be their safest starting point. Tetradic (or double-complementary) palettes use four colors arranged as two complementary pairs. These palettes offer the most variety but are the hardest to balance. With four distinct hues, the risk of visual chaos is high unless you pick one dominant color and use the other three sparingly. Tetradic schemes work best when you need to differentiate many categories or sections, like a dashboard with four data categories or a magazine layout with distinct content zones. Monochromatic palettes use a single hue with variations in lightness and saturation. A monochromatic blue palette might include navy, royal blue, sky blue, and ice blue. These palettes look sophisticated and unified, and they are excellent for creating depth through shade variation without introducing new hues. Corporate websites, portfolios, and minimalist apps often use monochromatic schemes. The limitation is that everything looks the same, so interactive elements like buttons and links need extra differentiation through size, weight, or a single contrasting accent color. When you open a color palette generator, you typically start in one of two ways. The first approach is to generate random palettes until something catches your eye. This is useful during the exploration phase when you do not have a specific direction yet. Each generation gives you a fresh set of colors following harmony rules, and you can lock individual colors you like while regenerating the rest. The second approach is to lock in a base color, usually your brand color or a color you extracted from an inspiration image, and let the generator build the rest of the palette around it using harmony rules. The second approach is faster when you already know your primary color. Here is a practical workflow for building a website palette from scratch. Start with your brand's primary color. If you do not have one, pick a color that matches the emotion you want your site to convey: blue for trust and stability, green for growth and health, red for urgency and passion, purple for creativity and luxury, orange for energy and friendliness. Lock that color in your generator. Select complementary or split-complementary as your harmony rule. The generator will produce a set of colors. From that set, assign roles: one dominant color for backgrounds and large surfaces, one secondary for headers and navigation, one accent for buttons and interactive elements. Add a near-white and a near-black as your text and background neutrals. You now have a functional five-color palette that covers every element on a typical web page. Expanding that five-color palette into a full design system requires generating shade scales. For each of your primary, secondary, and accent colors, create a scale from very light (suitable for backgrounds) to very dark (suitable for text on light backgrounds). A typical scale has 10 steps: 50, 100, 200, 300, 400, 500, 600, 700, 800, 900. The 500 step is usually your base color. Steps below 500 are progressively lighter (higher lightness in HSL), and steps above 500 are progressively darker (lower lightness). The palette generator can produce these shades by varying the lightness component of your base color. CSS custom properties make implementing your palette straightforward. Define your colors at the root level and reference them throughout your stylesheet: :root { --color-primary-50: #eff6ff; --color-primary-100: #dbeafe; --color-primary-200: #bfdbfe; --color-primary-500: #3b82f6; --color-primary-700: #1d4ed8; --color-primary-900: #1e3a8a; --color-secondary: #7c3aed; --color-accent: #f59e0b; --color-neutral-light: #f8fafc; --color-neutral-dark: #1e293b; } .button-primary { background-color: var(--color-primary-500); color: var(--color-neutral-light); } .button-primary:hover { background-color: var(--color-primary-700); } .card { background-color: var(--color-neutral-light); border-left: 4px solid var(--color-accent); color: var(--color-neutral-dark); } .section-highlight { background-color: var(--color-primary-50); border: 1px solid var(--color-primary-200); } This structure means you can swap your entire palette by changing the root variables. When a client asks "can we try it in green?" you update the root variables and the whole site changes. The shade scale also gives you built-in hover states, focus rings, and disabled states without needing to calculate new colors each time. Accessibility is a non-negotiable part of palette selection. The Web Content Accessibility Guidelines (WCAG) require a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (18px bold or 24px regular). Level AAA requires 7:1 for normal text. A beautiful palette is useless if people cannot read the text. After generating your palette, test every text-background combination with a contrast checker. If a combination fails, adjust the lightness or saturation of one of the colors until it passes. You do not need to change the hue, just the value. Common failure points include light gray text on white backgrounds, colored text on colored backgrounds, and placeholder text in form inputs. Here is an accessibility workflow that catches problems early. For each background color in your palette, identify which text colors you plan to use on it. Test each pair. If your primary-50 (very light blue) is a section background and your primary-500 is the text color, check the contrast. If it fails at 4.5:1, try primary-700 or primary-900 instead. Document the passing combinations in your design system as approved pairings. This prevents developers from accidentally using a low-contrast combination later. Dark mode is now an expected feature in most apps and websites. When you build your palette, create light and dark variants from the start rather than retrofitting later. A common approach is to generate your base palette and then create a second set where backgrounds become dark (gray-900 range) and text becomes light (gray-100 range). Your primary, secondary, and accent colors may need lightness adjustments to maintain sufficient contrast on dark backgrounds. A blue that works as a button color on white may be too dark to read against a near-black background. Using CSS custom properties with a data-theme attribute makes switching between modes clean: [data-theme="dark"] { --color-primary-500: #60a5fa; --color-neutral-light: #1e293b; --color-neutral-dark: #f1f5f9; --color-primary-50: #172554; --color-primary-200: #1e3a8a; } Notice that in dark mode, the numbering logic inverts. What was a light tint (50) becomes a dark shade, and what was a dark shade (900) becomes a light tint. Some design systems rename their tokens for dark mode to avoid confusion, using terms like "surface" and "on-surface" instead of numbered shades. Designers working with brand projects should know that color palettes extend beyond digital screens. If your brand will appear in print (business cards, packaging, signage), you need to verify that your chosen colors have acceptable CMYK and Pantone equivalents. Some vibrant digital colors, particularly neon greens and electric blues, cannot be accurately reproduced in print. The gamut of CMYK printing is narrower than the gamut of RGB screens. A palette generator gives you HEX and RGB values for digital use, but always cross-reference with a Pantone bridge guide for print work. Order a proof print before committing to a print run. Color psychology plays a real role in how users respond to your interface. Research from the Institute for Color Research shows that people make a subconscious judgment about an environment or product within 90 seconds, and up to 90% of that assessment is based on color alone. Blue dominates finance and technology brands (Chase, IBM, Facebook, PayPal) because it signals reliability and trust. Green is the default for health and environmental brands (Whole Foods, Animal Planet, Spotify). Red drives urgency and is used heavily in clearance sales and food brands (Coca-Cola, Netflix, Target). Yellow conveys optimism and grabs attention (IKEA, Best Buy, McDonalds). These associations are not universal across cultures. White signifies purity in Western cultures but mourning in some East Asian cultures. Red means luck in China but danger in Western contexts. If your audience spans multiple regions, research local color meanings before committing to a palette. When saving and organizing palettes, a naming convention helps. Instead of calling your palette colors "color 1" through "color 5," name them by role: primary, secondary, accent, surface, on-surface, error, warning, success, info. This makes your design tokens meaningful to every team member. Developers understand that --color-surface is for card backgrounds and --color-on-surface is for text on those cards. Designers and developers speaking the same language reduces miscommunication and revision cycles. Store your palette in a shared format like a JSON file, Figma library, or CSS custom properties file that both designers and developers reference. Here is an advanced technique for creating palettes that feel cohesive even with many colors. Start with your base hue and generate your palette. Then add a slight tint of your primary color to every other color in the set. If your primary is blue, add 5-10% blue to your greens, oranges, and neutrals. In HSL terms, this means shifting the hue of every color slightly toward your primary hue. This shared undertone creates visual unity even between colors that are far apart on the wheel. Stripe, Linear, and Vercel all have palettes where every color shares a subtle cool undertone. This technique is sometimes called "color temperature alignment" and it is one of the reasons some palettes feel polished while others feel like a random assortment. For data visualization, palette generation follows different rules. You need colors that are distinguishable from each other at a glance, even for users with color vision deficiencies. Sequential palettes (light to dark of one hue) work for ordered data like temperature ranges or population density. Diverging palettes (two hues meeting at a neutral midpoint) work for data with a meaningful center like profit/loss or temperature deviation from average. Categorical palettes (distinct hues) work for unrelated categories like product types or departments. Avoid using red and green together as the only distinguishing factor, since red-green color blindness (deuteranomaly and protanomaly) affects roughly 8% of men and 0.5% of women. Use colorblind-safe palettes from resources like ColorBrewer for any data visualization work. Performance considerations are worth mentioning for large-scale projects. If you use opacity or rgba values extensively in your palette, modern browsers handle them well, but older rendering engines may struggle with heavy layering of semi-transparent elements. Using solid colors where possible keeps rendering fast. If you need transparency for overlays or glass effects, define the transparency values in your palette tokens rather than applying them ad hoc throughout your CSS. This keeps things consistent and makes it easy to reduce transparency effects if performance testing reveals issues. Tailwind CSS users can integrate generated palettes directly into their configuration: module.exports = { theme: { extend: { colors: { brand: { 50: '#eff6ff', 100: '#dbeafe', 200: '#bfdbfe', 300: '#93c5fd', 400: '#60a5fa', 500: '#3b82f6', 600: '#2563eb', 700: '#1d4ed8', 800: '#1e40af', 900: '#1e3a8a', }, }, }, }, } This gives you utility classes like bg-brand-500, text-brand-900, and border-brand-200 throughout your templates. A palette is not final the moment you generate it. Test it in context. Apply it to actual UI elements: buttons, cards, forms, navigation bars, text blocks, hero sections, footers, error messages, success notifications. A color that looks great as a swatch may feel overwhelming as a full-width header background. Conversely, a subtle color that seems too quiet as a swatch might be exactly right for a large surface area. Print out your palette and look at it in different lighting conditions. View it on multiple monitors, because color rendering varies between displays. Test on mobile screens, which tend to be more saturated than desktop monitors. If you are working with a team, establish a palette review process. Have the palette reviewed by at least one other designer and one developer before finalizing it. The designer can evaluate aesthetics and brand alignment. The developer can check technical feasibility, dark mode compatibility, and accessibility compliance. A 30-minute review at this stage prevents weeks of rework later. Semantic color tokens add another layer of abstraction on top of your palette. Instead of using raw color values like --color-primary-500 directly in components, create semantic tokens that describe the purpose: --color-button-bg, --color-button-text, --color-input-border, --color-error-text, --color-success-bg. These semantic tokens reference your raw palette values: :root { --color-button-bg: var(--color-primary-500); --color-button-text: var(--color-neutral-light); --color-input-border: var(--color-primary-200); --color-input-border-focus: var(--color-primary-500); --color-error-text: var(--color-red-600); --color-success-bg: var(--color-green-50); } Semantic tokens make your CSS self-documenting and make dark mode, high-contrast mode, and theme variations trivial to implement. Swapping themes means remapping semantic tokens to different raw values rather than hunting through component CSS for hardcoded colors. For projects using design tools like Figma, keeping your palette synchronized between design and code prevents drift. Export your Figma color styles as design tokens (using tools like Figma Tokens, Style Dictionary, or the Figma Variables API) and generate CSS custom properties from the same source of truth. When the designer updates a color, the code updates automatically after a build step. This single-source-of-truth workflow eliminates the common scenario where designers and developers end up using slightly different shades of the same color. Color palette generators can also create palettes from images, which is useful for brand work and mood boards. Upload a photograph that captures the feeling you want, such as a sunset for warmth or a forest for earthiness, and the generator extracts the dominant colors. These extracted colors become the foundation of your palette, giving you a set that inherently feels cohesive because the colors already coexist in a natural scene. This technique bridges the gap between abstract color theory and visual intuition. Designers who struggle with the color wheel often find it easier to start from a photo that represents the desired mood. For component libraries and design systems shared across teams, palette governance prevents color drift over time. Establish a change request process for adding new colors to the palette. Every proposed addition should justify its necessity (is there truly no existing color that serves this purpose?) and demonstrate accessibility compliance. Without governance, palettes grow from 5 colors to 50 over a few years, diluting brand consistency and increasing CSS complexity. Brand palette documentation should include usage guidelines, not just color values. For each color, document where it should and should not be used. For example: "Primary blue (--color-primary-500) is used for interactive elements: buttons, links, toggles, and selected states. Do not use it for large background areas. For large blue backgrounds, use --color-primary-50 with --color-primary-900 text." These guidelines prevent misuse and maintain visual consistency as your team grows. The color palette generator produces your starting point. From there, you refine based on contrast requirements, dark mode needs, shade scale generation, print compatibility, cultural considerations, data visualization needs, and real-world testing across devices and contexts. The tool saves you from the trial-and-error of picking colors manually and gives you a theoretically sound foundation. What you build on top of that foundation is where your design skill comes in.
Frequently asked questions
Can I create a complementary color palette?
Yes! I support multiple harmony rules including complementary, triadic, and analogous ones.
How do I copy colors to use in my code?
Just click any color swatch to copy its HEX or RGB value directly to your clipboard.
