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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Pick a color on an interactive HSV color wheel, see ten harmony types as markers, check WCAG contrast and export the palette as CSS, SCSS or JSON.
Open the toolFree contrast checker that tests text and background colors against WCAG 2.2 AA and AAA, shows the APCA score and suggests accessible fixes for designers and developers.
Upload, paste or link a photo and get a 3 to 12 color palette with HEX codes, share percentages and contrast badges. Edit, lock and export for designers and developers.
Preview how images and colors look with protanopia, deuteranopia, tritanopia or achromatopsia, and flag color pairs that become hard to tell apart. Free, in your browser.
Create linear, radial and conic CSS gradients with up to 8 color stops, check text contrast, and export CSS, Tailwind, SCSS, SVG, PNG or JSON.
Convert any color between HEX, RGB, HSL, HSV, HWB, CMYK, OKLCH and Lab, edit channels, check contrast on white and black, and export CSS, JSON or Tailwind code.
Today's featured color with insights and inspiration
This Basil Smash carries the bright and open essence of the natural world. Green tones create spaces that feel balanced, healthy, and prosperous.
Studies show that people working in green environments report 15% higher creativity scores than those in neutral-colored spaces.
Green is psychologically linked to decision-making and ambition. It represents growth, safety, and permission to proceed (like traffic lights).
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Color theory, design tips, and inspiration from the 66Colorful team.
Turn color relationships into quick rounds: draw a starting hue, predict its complement, neighbors and triad, then check answers on screen and score readable…
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You have the line art. Now choose colors from the original photo, trim them to a workable set, and test the page in grayscale…
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A HEX to Pantone result is a candidate to inspect, not an ink match. See a worked example, a CMYK estimate and a simple…
Read PostCommon questions about colors, palettes, and design — answered by the team behind 66colorful's 50+ free tools.
Explore all toolsA 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.