Test a colour pair where people will actually read it

Contrast checkers and visual comparisons for evaluating text and interface colours beyond a palette preview.

A palette can look harmonious while a label disappears against its background. Colour decisions need a context: text size, surrounding content, focus states, and the screen on which someone reads. These tools help compare foreground and background values and consider different viewing conditions. Use the result to investigate your actual interface rather than treating one passing badge as the end of accessibility work.

Try this first

Take one real label and its exact background colour. Record the pair, inspect the relevant text or interface criterion, then test the same choice in its other states. Try a longer label and a narrow viewport. Keep non-colour cues for meaning, and check a changed colour again in the surrounding layout.

Keep in mind

Simulations cannot reproduce every person’s vision or environment. Contrast checking is one part of an accessibility review, and an isolated pair cannot account for gradients, images, transparency, or all interaction states. Verify the actual rendered result.