#53C2C3 · #FFFFFF
Four independent scores (read the one that fits your goal): Readability 23/100 (fail) · Harmony 100/100 (complementary) · Distinguishable 85/100 (easy to tell apart) · Match 6/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
GemTurquoise and White are very different (ΔE 43). They have near-opposite hues (179° apart) and their lightness is different, giving a clear light/dark split.
GemTurquoise text on White: 2.13:1 (Fail); White text on GemTurquoise: 2.13:1 (Fail). Neither meets AA at body size — nudging one color to #008486 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 2.1:1, below the 4.5:1 minimum. Nudging one colour to #008486 clears AA.
Their CIE76 ΔE is about 43 — very different.
clearly different colours (ΔE 43).
Explore each color: GemTurquoise #53C2C3 · White #FFFFFF · Shades: GemTurquoise shades · White shades · Contrast checker →