#006369 · #6E510F
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 93/100 (split-complementary) · Distinguishable 98/100 (easy to tell apart) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Dark Vivid Cyan and Dark Yellow are very different (ΔE 58). They have distinctly different hues (142° apart) and their lightness is similar, so they read as two same-weight colours.
Dark Vivid Cyan text on Dark Yellow: 1.05:1 (Fail); Dark Yellow text on Dark Vivid Cyan: 1.05:1 (Fail). Neither meets AA at body size — nudging one color to #88D7DD clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 93/100). 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 #88D7DD clears AA.
Their CIE76 ΔE is about 58 — very different.
clearly different colours (ΔE 58).
Explore each color: Dark Vivid Cyan #006369 · Dark Yellow #6E510F · Shades: Dark Vivid Cyan shades · Dark Yellow shades · Contrast checker →