#0088AE · #857F00
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 69/100 (split-complementary (soft)) · 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 Olive are very different (ΔE 86). They have distinctly different hues (136° apart) and their lightness is similar, so they read as two same-weight colours.
Cerulean text on Olive: 1.02:1 (Fail); Olive text on Cerulean: 1.02:1 (Fail). Neither meets AA at body size — nudging one color to #00131E clears it.
Split-complementary (soft) — workable but not a textbook harmony (harmony 69/100). 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 #00131E clears AA.
Their CIE76 ΔE is about 86 — very different.
clearly different colours (ΔE 86).
Explore each color: Cerulean #0088AE · Olive #857F00 · Shades: Cerulean shades · Olive shades · Contrast checker →