#06212A · #201E08
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 90/100 (split-complementary) · Distinguishable 58/100 (somewhat similar) · Match 51/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Cyan and Deep Yellow are a clear pair (ΔE 22). They have distinctly different hues (140° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Cyan text on Deep Yellow: 1.01:1 (Fail); Deep Yellow text on Deep Cyan: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #6C8994 clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 90/100). 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 #6C8994 clears AA.
Their CIE76 ΔE is about 22 — a clear pair.
clearly different colours (ΔE 22).
Explore each color: Deep Cyan #06212A · Deep Yellow #201E08 · Shades: Deep Cyan shades · Deep Yellow shades · Contrast checker →