🎨 Color Picker & Converter
Convert HEX, RGB, HSL, CMYK — generate palettes and check contrast.
Complementary Palette
Click any swatch to set it as the active color.
Popular Colors
WCAG Contrast Checker
What Is a Color Picker?
A color picker is a tool that lets you select, convert, and explore colors across different color models — HEX (hexadecimal), RGB (red-green-blue), HSL (hue-saturation-lightness), and CMYK (cyan-magenta-yellow-black). Designers, developers, and marketers use color pickers to find exact color codes for use in CSS, design software, brand guidelines, and print materials.
Different color formats serve different contexts. HEX codes (#1a1a2e) are the standard for web development and CSS — compact 6-character codes that browsers parse directly. RGB values (rgb(26, 26, 46)) are used in web design, video production, and screen-based design. HSL (hsl(240, 28%, 14%)) is increasingly preferred by developers because it's more intuitive — you can mentally adjust lightness and saturation to predict what a color modification will look like. CMYK is the standard for print design, where colors are mixed from four inks rather than light.
Color theory is foundational to effective design. The color wheel organizes colors by their relationships: complementary colors (opposite on the wheel, like blue and orange) create high contrast and visual energy. Analogous colors (adjacent on the wheel) create harmonious, cohesive palettes. Triadic colors (equally spaced on the wheel) produce vibrant, balanced designs. Understanding these relationships — and seeing them in HSL space where relationships are geometrically intuitive — helps designers build palettes that work rather than just picking colors by feel.
For web accessibility, color contrast matters as much as color choice. WCAG 2.1 guidelines require a minimum contrast ratio of 4.5:1 between text and background for normal text, and 3:1 for large text, to ensure readability for users with low vision. A color picker that shows contrast ratios helps you verify accessibility compliance before publishing.
How to Use This Color Picker
- Pick a color visually — click anywhere on the color spectrum or drag the saturation/brightness selector to choose your starting color.
- Enter a known color code — if you have a HEX code, RGB values, or HSL values, type them in to see the color and get all alternative format conversions instantly.
- Copy the format you need — click to copy the HEX code for CSS, the RGB values for design software, or HSL for CSS custom properties.
- Explore related colors — use the hue slider to shift to analogous or complementary colors while maintaining the same saturation and lightness level.
- Save your palette — note the HEX codes of colors you want to use together for a consistent visual identity across your project.
Why Color Consistency Matters for Branding
Research by the University of Loyola found that color increases brand recognition by up to 80%. Consistent brand colors signal professionalism and build visual trust with audiences. Using exact HEX codes (rather than "approximately blue") ensures that your brand appears identical across website, social media, print materials, and presentations. A color picker is how you move from "we use teal" to "#00d4aa, rgb(0, 212, 170), hsl(168, 100%, 42%)" — specific values that produce identical results in any design tool or browser.
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Frequently Asked Questions
What is the difference between HEX and RGB color codes?
HEX codes are a hexadecimal (base-16) representation of RGB values. #1a1a2e breaks down as R=1a (decimal 26), G=1a (decimal 26), B=2e (decimal 46). RGB notation writes these directly as rgb(26, 26, 46). Both represent the same color — HEX is more compact for use in HTML/CSS; RGB is more human-readable and easier to adjust programmatically. Conversion is straightforward: each pair of HEX digits corresponds to one RGB channel value from 0–255.
When should I use HSL instead of HEX or RGB?
HSL (Hue, Saturation, Lightness) is more intuitive for making systematic color adjustments. Hue is a 0–360 degree rotation of the color wheel. Saturation is 0% (grayscale) to 100% (full color). Lightness is 0% (black) to 100% (white). With HSL, you can change just the lightness to create a lighter shade (hsl(240, 28%, 14%) to hsl(240, 28%, 25%)) without affecting hue or saturation. This makes HSL ideal for building consistent design systems with predictable hover states, disabled states, and color variations from a base brand color.
What is a good text-to-background contrast ratio?
WCAG 2.1 Level AA requires 4.5:1 contrast ratio for normal text and 3:1 for large text (18pt+). Level AAA requires 7:1 for normal text. Black text on white background has a 21:1 ratio (maximum possible). Dark gray (#333) on white is 12.6:1 — excellent. The ZappMint dark navy (#1a1a2e) on white achieves approximately 16:1 — well above requirements. Common failures include light gray text on white backgrounds (3:1 or below) and yellow text on white backgrounds. Always verify contrast for any custom color combination before publishing.
How do I pick a good color palette for a website?
Start with your primary brand color, then build around it systematically. Choose one dominant neutral (white, light gray, or dark navy for dark themes). Add one accent color for CTAs and highlights — your primary color's complement (opposite on the color wheel) creates natural visual tension that draws attention. Keep your palette to 3–5 colors maximum; more creates visual chaos. Tools like Coolors.co, Adobe Color, and Paletton generate harmonious multi-color palettes from a starting color. Verify all text-background combinations meet WCAG contrast requirements before committing.
What is the difference between CMYK and RGB color spaces?
RGB is an additive color model — colors are created by mixing red, green, and blue light. It's used for screens (monitors, phones, TVs) where black is the absence of light. CMYK is a subtractive color model — colors are created by applying cyan, magenta, yellow, and black inks that absorb (subtract) light from white paper. The same HEX color looks slightly different in CMYK print because the gamut (range of reproducible colors) differs — some vibrant RGB colors cannot be faithfully reproduced in CMYK. If you're designing for print, always work in CMYK from the start rather than converting from RGB at the end.