Contrast against its own background — WCAG 2.1, body-size text The 4.5:1 minimum is marked. Bars are measured, not estimated. 0 5 10 15 4.5:1 — AA minimum On paper #f4efe4 Ink #2c2823 12.76 Muted #6f6656 4.94 Accent deep #8a3d24 6.60 Accent #b5502f 4.41 ✕ On ink dark #1c1a17 Paper #ece5d8 13.86 Muted #a99a80 6.30 Warm #e08a5c 6.58 Accent #b5502f 3.43 ✕ The same mid accent fails on both sides — too light on paper, too dark on ink. It is a UI accent, never a text colour.