#0399AB · #FFFFFF
Four independent scores (read the one that fits your goal): Readability 46/100 (aa large) · Harmony 100/100 (complementary) · Distinguishable 94/100 (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.
Dark Vivid Cyan and White are very different (ΔE 53). They have near-opposite hues (174° apart) and their lightness is different, giving a clear light/dark split.
Dark Vivid Cyan text on White: 3.42:1 (AA Large); White text on Dark Vivid Cyan: 3.42:1 (AA Large). Neither meets AA at body size — nudging one color to #008392 clears it.
Complementary — 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 3.4:1, below the 4.5:1 minimum. Nudging one colour to #008392 clears AA.
Their CIE76 ΔE is about 53 — very different.
clearly different colours (ΔE 53).
Explore each color: Dark Vivid Cyan #0399AB · White #FFFFFF · Shades: Dark Vivid Cyan shades · White shades · Contrast checker →