#009459 · #6872CE
Four independent scores (read the one that fits your goal): Readability 2/100 (fail) · Harmony 28/100 (clashing) · Distinguishable 60/100 (somewhat similar) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Sea Green and Blue are very different (ΔE 99). They have distinctly different hues (78° apart) and their lightness is different, giving a clear light/dark split.
Sea Green text on Blue: 1.10:1 (Fail); Blue text on Sea Green: 1.10:1 (Fail). Neither meets AA at body size — nudging one color to #001104 clears it.
Clashing — awkward hue gap — tends to clash (harmony 28/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.1:1, below the 4.5:1 minimum. Nudging one colour to #001104 clears AA.
Their CIE76 ΔE is about 99 — very different.
clearly different colours (ΔE 99).
Explore each color: Sea Green #009459 · Blue #6872CE · Shades: Sea Green shades · Blue shades · Contrast checker →