#00C4E5 · #00CABC
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 78/100 (monochrome) · Distinguishable 32/100 (hard to tell apart) · Match 39/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Sky Blue and Dark Turquoise are a clear pair (ΔE 28). They have closely related hues (13° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Sky Blue text on Dark Turquoise: 1.01:1 (Fail); Dark Turquoise text on Deep Sky Blue: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #004E5D clears it.
Monochrome — monochrome — a recognised, balanced pairing (harmony 78/100). 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 #004E5D clears AA.
Their CIE76 ΔE is about 28 — a clear pair.
clearly different colours (ΔE 28).
Explore each color: Deep Sky Blue #00C4E5 · Dark Turquoise #00CABC · Shades: Deep Sky Blue shades · Dark Turquoise shades · Contrast checker →