#40CDC2 · #45C7E6
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 82/100 (analogous) · Distinguishable 27/100 (hard to tell apart) · Match 46/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Medium Turquoise and Dark Turquoise are a clear pair (ΔE 25). They have closely related hues (16° apart) and their lightness is similar, so they read as two same-weight colours.
Medium Turquoise text on Dark Turquoise: 1.02:1 (Fail); Dark Turquoise text on Medium Turquoise: 1.02:1 (Fail). Neither meets AA at body size — nudging one color to #00534E clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 82/100). 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 #00534E clears AA.
Their CIE76 ΔE is about 25 — a clear pair.
clearly different colours (ΔE 25).
Explore each color: Medium Turquoise #40CDC2 · Dark Turquoise #45C7E6 · Shades: Medium Turquoise shades · Dark Turquoise shades · Contrast checker →