What is the difference between HEX, RGB, HSL, and OKLCH color spaces?

HEX and RGB represent colors using red, green, and blue light channels (0-255). HSL represents hue, saturation, and lightness in a cylinder, but lacks perceptual uniformity (yellow appears much brighter than blue at 50% lightness). OKLCH is a modern, perceptually uniform color space where lightness matches human eye perception, preventing muddy gradient blending and unpredictable contrast.

What are the WCAG 2.1 color contrast requirements for AA and AAA compliance?

WCAG 2.1 requires a minimum contrast ratio of 4.5:1 for normal body text and 3:1 for large text (18pt or 14pt bold) to meet Level AA. For Level AAA enhanced compliance, normal text must meet 7:1 and large text must achieve 4.5:1.

Does Color Code upload my photos to an external server when extracting colors?

No. The Image Color Extractor runs entirely in your local browser using HTML5 Canvas and Web APIs. Your images and extracted pixel data never leave your computer.

What are the standard color harmonies used in web design?

Key color harmonies include: Complementary (two colors directly opposite at 180° on the color wheel), Analogous (adjacent colors spaced 30° apart), Triadic (three colors equally spaced at 120°), Split-Complementary (a base color plus two colors adjacent to its complement at 150° and 210°), and Tetradic (four colors in two complementary pairs at 90° intervals).

How does the Color Blindness Simulator calculate color deficiency filters?

Our simulator applies scientifically calibrated Brettel and Machado matrix transformations to simulate Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and total Achromatopsia, enabling designers to verify visual accessibility before publishing.

How do I export colors to Tailwind CSS or CSS Custom Properties?

Every tool on Color Code includes instant copy buttons for CSS variables (--color-primary: #hex), Tailwind class names, JSON token dictionaries, and SVG palettes.

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