#03EFFD · #9EDDFF
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 91/100 (analogous) · Distinguishable 64/100 (somewhat similar) · Match 34/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Aqua and Light Blue are very different (ΔE 30). They have closely related hues (18° apart) and their lightness is different, giving a clear light/dark split.
Aqua text on Light Blue: 1.04:1 (Fail); Light Blue text on Aqua: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #00676D clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 91/100). 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 #00676D clears AA.
Their CIE76 ΔE is about 30 — very different.
clearly different colours (ΔE 30).
Explore each color: Aqua #03EFFD · Light Blue #9EDDFF · Shades: Aqua shades · Light Blue shades · Contrast checker →