#0B80D0 · #638B00
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 90/100 (triadic) · 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.
Vivid Cyan and Olive Drab are very different (ΔE 111). They have distinctly different hues (127° apart) and their lightness is similar, so they read as two same-weight colours.
Vivid Cyan text on Olive Drab: 1.04:1 (Fail); Olive Drab text on Vivid Cyan: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #00162F clears it.
Triadic — triadic — 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 #00162F clears AA.
Their CIE76 ΔE is about 111 — very different.
clearly different colours (ΔE 111).
Explore each color: Vivid Cyan #0B80D0 · Olive Drab #638B00 · Shades: Vivid Cyan shades · Olive Drab shades · Contrast checker →