Add the colours in a palette — a brand kit, a chart’s series colours, a UI theme — and check every pairwise contrast ratio at once, not just two colours at a time.
| Pair | Ratio | Normal text | Large text |
|---|---|---|---|
| 14.21:1 | AAA | AAA | |
| 2.73:1 | Fails | Fails | |
| 3.14:1 | Fails | AA | |
| 5.21:1 | AA | AAA | |
| 4.53:1 | AA | AAA | |
| 1.15:1 | Fails | Fails |
Each row is every pair in your palette compared as potential text/background combinations — a palette with no visible “Fails” badges has no problematic pairing for normal text.