#5ECC90 · #9FABFF
Four independent scores (read the one that fits your goal): Readability 2/100 (fail) · Harmony 41/100 (clashing) · Distinguishable 55/100 (somewhat similar) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Emerald and Light Vivid Blue are very different (ΔE 88). They have distinctly different hues (85° apart) and their lightness is different, giving a clear light/dark split.
Emerald text on Light Vivid Blue: 1.08:1 (Fail); Light Vivid Blue text on Emerald: 1.08:1 (Fail). Neither meets AA at body size — nudging one color to #004F2D clears it.
Clashing — awkward hue gap — tends to clash (harmony 41/100). 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 #004F2D clears AA.
Their CIE76 ΔE is about 88 — very different.
clearly different colours (ΔE 88).
Explore each color: Emerald #5ECC90 · Light Vivid Blue #9FABFF · Shades: Emerald shades · Light Vivid Blue shades · Contrast checker →