#0080D1 · #FFFFFF
Four independent scores (read the one that fits your goal): Readability 56/100 (aa large) · Harmony 100/100 (split-complementary) · Distinguishable 93/100 (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 White are very different (ΔE 69). They have near-opposite hues (157° apart) and their lightness is different, giving a clear light/dark split.
Vivid Cyan text on White: 4.19:1 (AA Large); White text on Vivid Cyan: 4.19:1 (AA Large). Neither meets AA at body size — nudging one color to #007AC9 clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 100/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 4.2:1, below the 4.5:1 minimum. Nudging one colour to #007AC9 clears AA.
Their CIE76 ΔE is about 69 — very different.
clearly different colours (ΔE 69).
Explore each color: Vivid Cyan #0080D1 · White #FFFFFF · Shades: Vivid Cyan shades · White shades · Contrast checker →