Two colours in, the ratio out, measured the way the standard measures it. If it falls short, the nearest shade that passes is one click away. Paste a whole stylesheet to see every pair at once.
Body text at 14px. The quick brown fox jumps over the lazy dog, and the reader has to get to the end of the sentence without effort.
Bold at 14pt counts as large text
Display type, 24px and up.
Rows are text, columns are background. Ratios are WCAG 2 relative-luminance contrast. 4.5:1 passes AA for body text, 3:1 for large text and interface parts, 7:1 is AAA.