#3F8E62 · #B1644F
Four independent scores (read the one that fits your goal): Readability 2/100 (fail) · Harmony 85/100 (triadic) · Distinguishable 86/100 (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.
Sea Green and Clay are very different (ΔE 65). They have distinctly different hues (134° apart) and their lightness is similar, so they read as two same-weight colours.
Sea Green text on Clay: 1.09:1 (Fail); Clay text on Sea Green: 1.09:1 (Fail). Neither meets AA at body size — nudging one color to #000E03 clears it.
Triadic — triadic — a recognised, balanced pairing (harmony 85/100). 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 #000E03 clears AA.
Their CIE76 ΔE is about 65 — very different.
clearly different colours (ΔE 65).
Explore each color: Sea Green #3F8E62 · Clay #B1644F · Shades: Sea Green shades · Clay shades · Contrast checker →