#53CBB9 · #EF96AF
Four independent scores (read the one that fits your goal): Readability 2/100 (fail) · Harmony 99/100 (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.
Medium Aquamarine and Light Red are very different (ΔE 74). They have near-opposite hues (172° apart) and their lightness is different, giving a clear light/dark split.
Medium Aquamarine text on Light Red: 1.10:1 (Fail); Light Red text on Medium Aquamarine: 1.10:1 (Fail). Neither meets AA at body size — nudging one color to #004C44 clears it.
Complementary — complementary — a recognised, balanced pairing (harmony 99/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.1:1, below the 4.5:1 minimum. Nudging one colour to #004C44 clears AA.
Their CIE76 ΔE is about 74 — very different.
clearly different colours (ΔE 74).
Explore each color: Medium Aquamarine #53CBB9 · Light Red #EF96AF · Shades: Medium Aquamarine shades · Light Red shades · Contrast checker →