Free · Check readable text colors

APCA Contrast Checker

Check modern perceptual contrast for text and background colors, with a real text preview and plain guidance.

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Check text contrast

APCA looks at how readable text feels on a glowing screen. Text and background order matters.

Clear words help people move faster.This is a preview of normal body text on your chosen background.
APCA contrast+99.9 Lc

Very strong contrast

This pair has strong perceptual contrast for common reading sizes. Dark text on light.

APCA is a modern contrast model that is still changing. Use this score as guidance, not as a claim that a design meets a law or standard.

Three simple steps

How to use it

  1. Choose the text color first, then the background color.
  2. Read the Lc score and preview normal and large text.
  3. Treat the result as design guidance while APCA continues to evolve.

Your colors stay on this device

This tool runs in your browser. Bookify does not upload or save your colors or images. Close the tab and the working data is gone.