A SMALL TOOL WITH ONE JOB
About Contrastclear.
Contrastclear is a focused text-colour calculator for opaque, 8-bit sRGB HEX pairs.
It applies WCAG 2.2 relative-luminance arithmetic, reports normal- and large-text ratio thresholds separately, and supplies a small set of text previews. Swapping colours, local text reports and an explicit share link make a pair easy to reproduce.
It does not scan websites, interpret transparency, audit fonts or declare whole-page WCAG conformance. The guide cites W3C’s primary definitions and explains the calculation through worked examples.
Free to use
There is no subscription, checkout or account. The calculator is part of an independently operated collection of free planning tools. Each site focuses on one calculation so its assumptions stay easy to inspect.
How the tool is maintained
The calculation method is described in the worked guide. Automated checks cover conversion factors, example results and invalid inputs. A model can still miss a practical detail; use the guide to decide whether its assumptions fit your situation.
Corrections and questions
For a reproducible calculation problem or a privacy enquiry, use our shared portfolio contact. Include the inputs and expected result. No telephone call is needed.