Contrast ratio
Contrast ratio: 21.00 : 1
Large text sample (24 px)
Normal text sample: the quick brown fox jumps over the lazy dog.
The ratio uses the WCAG 2.x relative luminance formula and is shown rounded down to two decimals. Thresholds: AA normal text 4.5, AA large text 3, AAA normal text 7, AAA large text 4.5.
More tools
Need to check a whole palette under colour blindness too? Open the full palette checker. See also the color blindness simulator.
Reference: the WCAG 2.1 contrast minimum at w3.org.
Palette pack (pay what you want)
This checker stays free and complete. If you also want ready-made palettes, we offer a pack called "Colour-blind-safe palette pack: 12 measured palettes for game UI". Pay what you want, $0 minimum. Payment is optional.
- 12 palettes of 4, 6 and 8 colours, each as its own GIMP palette file named like cb4-any.gpl.txt.
- A CSV, a static swatch page in HTML, a measurement report and a README.
- The report lists, for each palette, the measured minimum CIEDE2000 difference under normal vision, protanopia, deuteranopia and tritanopia.