#5FB165 · #7298EF
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 70/100 (triadic) · Distinguishable 70/100 (easy to tell apart) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Medium Sea Green and Cornflower Blue are very different (ΔE 95). They have distinctly different hues (97° apart) and their lightness is similar, so they read as two same-weight colours.
Medium Sea Green text on Cornflower Blue: 1.07:1 (Fail); Cornflower Blue text on Medium Sea Green: 1.07:1 (Fail). Neither meets AA at body size — nudging one color to #003C09 clears it.
Triadic — triadic — a recognised, balanced pairing (harmony 70/100). 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 #003C09 clears AA.
Their CIE76 ΔE is about 95 — very different.
clearly different colours (ΔE 95).
Explore each color: Medium Sea Green #5FB165 · Cornflower Blue #7298EF · Shades: Medium Sea Green shades · Cornflower Blue shades · Contrast checker →