Huecheck

Huecheck tells you whether a text color is readable on its background, and if it is not, which color would be. It is a pocket tool for designers, developers and anyone choosing colors for a screen, a slide or a sign. CONTRAST AT A GLANCE • A live preview of large text, body text, small print and a button in your two colors. • The WCAG 2.x contrast ratio, rounded down so a pair never looks like it passes when it doesn't. • Pass or fail for AA (4.5:1), AA large text (3:1), AAA (7:1), AAA large text (4.5:1) and interface parts such as icons and borders (3:1). • Swap text and background in one tap. FIX IT, DON'T GUESS When a pair fails, Huecheck finds the closest version of your text color, same hue, just lighter or darker, that reaches AA and AAA, and applies it in one tap. PICK ANY COLOR Type a color as #RGB, #RRGGBB, rgb() or hsl(), or drag the hue, saturation and lightness sliders and watch the ratio change as you go. COLOR BLINDNESS PREVIEW See your colors as they might look with protanopia, deuteranopia, tritanopia or in greyscale, to catch pairs that only differ by hue. PALETTE MATRIX Save up to 24 colors with labels and see the contrast of every pair in one table, colored by the level it reaches. Tap a pair to open it in the checker. CONVERTER Turn any color into HEX, RGB and HSL, with its luminance and its contrast on white and on black. Long-press a value to copy it. Works offline, with no account, ads or tracking. Your colors stay on your phone. The color blindness preview is an approximation, meant for spotting color pairs that are hard to tell apart.

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