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Search 4,900+ named colors, generate palettes and gradients, convert HEX, RGB and HSL, and check WCAG contrast — 50+ free color tools for designers and developers.

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Detects hex codes, color names, rgb( ), hsl( ) and hsv( ) ·

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Featured Color Tools

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Color of the Day

Today's featured color with insights and inspiration

Wasabi

#BBDD88

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Description

This Wasabi combines the clarity of yellow with the balance of green, creating a bright and open shade that feels alive and dynamic.

Fun Fact

Lime colors are increasingly used in gaming and tech interfaces because they're highly visible against both dark and light backgrounds.

Psychology

Lime tones are psychologically associated with growth, progress, and forward momentum — making them ideal for brands targeting dynamic audiences.

Usage Examples

Environmental brands Tech startup branding Energy product design Wedding invitations
This Season

Trending Colors in Summer

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Curated Combos

Popular Color Palettes

Curated color combinations perfect for your next project

Quick Color Tools

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Colors from an Image

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Full Palette from Image

Gradient Maker

Full Gradient Generator

Contrast Check

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Full Contrast Checker

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Advanced Color Wheel
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From Our Blog

Color theory, design tips, and inspiration from the 66Colorful team.

Good to Know

Frequently Asked Questions

Common questions about colors, palettes, and design — answered by the team behind 66colorful's 50+ free tools.

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A HEX color code is a 6-digit hexadecimal number used to represent colors in web design and digital media. It consists of three pairs of characters representing Red, Green, and Blue values (e.g., #FF5733). HEX codes are the most common format for specifying colors in CSS and HTML.

You can use our HEX to RGB converter tool. Simply enter your HEX code and get instant RGB values. Each pair of HEX digits converts to a number between 0-255 for Red, Green, and Blue channels. For example, #FF5733 converts to rgb(255, 87, 51).

Color contrast is the difference in luminance between foreground and background colors. The Web Content Accessibility Guidelines (WCAG 2.1) require a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text to ensure readability for people with visual impairments. Use our Contrast Checker tool to verify your color combinations.

Use our Color Wheel tool to select a base color, then choose a harmony type (complementary, analogous, triadic, split-complementary, or tetradic) to generate a professionally balanced palette. You can also extract palettes from images using our Palette from Image tool.

RGB (Red, Green, Blue) is an additive color model used for digital screens where combining all colors produces white light. CMYK (Cyan, Magenta, Yellow, Key/Black) is a subtractive color model used in print where combining all colors produces black. Use our Color Converter to switch between formats.

Use our Color Blindness Simulator to preview how your design appears to people with different types of color vision deficiency, including protanopia, deuteranopia, and tritanopia. Our Palette Accessibility Matrix can check all color combinations in your palette at once.