#00444A · #4C3700
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 93/100 (split-complementary) · Distinguishable 90/100 (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.
Charcoal and Deep Vivid Yellow are very different (ΔE 47). They have distinctly different hues (141° apart) and their lightness is similar, so they read as two same-weight colours.
Charcoal text on Deep Vivid Yellow: 1.04:1 (Fail); Deep Vivid Yellow text on Charcoal: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #73ADB3 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 #73ADB3 clears AA.
Their CIE76 ΔE is about 47 — very different.
clearly different colours (ΔE 47).
Explore each color: Charcoal #00444A · Deep Vivid Yellow #4C3700 · Shades: Charcoal shades · Deep Vivid Yellow shades · Contrast checker →