#02212B · #211E05
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 92/100 (split-complementary) · Distinguishable 63/100 (somewhat similar) · Match 46/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Vivid Cyan and Deep Yellow are a clear pair (ΔE 25). They have distinctly different hues (141° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Vivid Cyan text on Deep Yellow: 1.00:1 (Fail); Deep Yellow text on Deep Vivid Cyan: 1.00:1 (Fail). Neither meets AA at body size — nudging one color to #698A96 clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 92/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.0:1, below the 4.5:1 minimum. Nudging one colour to #698A96 clears AA.
Their CIE76 ΔE is about 25 — a clear pair.
clearly different colours (ΔE 25).
Explore each color: Deep Vivid Cyan #02212B · Deep Yellow #211E05 · Shades: Deep Vivid Cyan shades · Deep Yellow shades · Contrast checker →