#4FBBE3 · #7CAFF3
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 86/100 (analogous) · Distinguishable 35/100 (hard to tell apart) · Match 50/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Sky Blue and Light Blue are a clear pair (ΔE 23). They have closely related hues (18° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Sky Blue text on Light Blue: 1.03:1 (Fail); Light Blue text on Deep Sky Blue: 1.03:1 (Fail). Neither meets AA at body size — nudging one color to #00475D clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 86/100). 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 #00475D clears AA.
Their CIE76 ΔE is about 23 — a clear pair.
clearly different colours (ΔE 23).
Explore each color: Deep Sky Blue #4FBBE3 · Light Blue #7CAFF3 · Shades: Deep Sky Blue shades · Light Blue shades · Contrast checker →