#01BEE5 · #63B0FD
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 96/100 (analogous) · Distinguishable 39/100 (hard to tell apart) · Match 36/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Sky Blue and Vivid Cyan are a clear pair (ΔE 29). They have closely related hues (20° apart) and their lightness is different, giving a clear light/dark split.
Deep Sky Blue text on Vivid Cyan: 1.04:1 (Fail); Vivid Cyan text on Deep Sky Blue: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #004657 clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 96/100). 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 #004657 clears AA.
Their CIE76 ΔE is about 29 — a clear pair.
clearly different colours (ΔE 29).
Explore each color: Deep Sky Blue #01BEE5 · Vivid Cyan #63B0FD · Shades: Deep Sky Blue shades · Vivid Cyan shades · Contrast checker →