#0787AC · #AF643F
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 95/100 (complementary) · Distinguishable 100/100 (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.
Cerulean and Clay are very different (ΔE 76). They have near-opposite hues (174° apart) and their lightness is similar, so they read as two same-weight colours.
Cerulean text on Clay: 1.07:1 (Fail); Clay text on Cerulean: 1.07:1 (Fail). Neither meets AA at body size — nudging one color to #000912 clears it.
Complementary — complementary — a recognised, balanced pairing (harmony 95/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.1:1, below the 4.5:1 minimum. Nudging one colour to #000912 clears AA.
Their CIE76 ΔE is about 76 — very different.
clearly different colours (ΔE 76).
Explore each color: Cerulean #0787AC · Clay #AF643F · Shades: Cerulean shades · Clay shades · Contrast checker →