Contrast Matrix 98

◐ CONTRAST MATRIX 98.EXE×

Build a palette and instantly test every foreground/background combination. Ratios use the WCAG relative-luminance formula and everything runs locally.

AA normal text requires 4.5:1; AAA normal text requires 7:1.

AA = at least 4.5:1 for normal text · AA+ = at least 3:1 for large text · AAA = at least 7:1. Matrix cells preview the row color as text over the column color.