Color Tools
Color Tools Calculators
Convert, pick, and check colors and contrast for accessible, readable design.
4 tools
Contrast Ratio Calculator (WCAG)
Check the contrast ratio between two colors and see whether it passes WCAG AA and AAA for normal and large text.
HEX to RGB Converter
Convert any hex color code to its red, green, and blue (RGB) values instantly, in the browser.
Color Picker
Choose a color, inspect HEX, RGB, HSL, HSV, and CMYK values, and copy formats locally.
Hex to Decimal Converter
Convert hexadecimal and decimal values with an interactive positional-value explanation.
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How to use this collection
Choose the calculator that matches the decision you are making. Each tool explains its assumptions and keeps the primary calculation separate from any commercial recommendation.