#3C8D66 · #AD654C
Four independent scores (read the one that fits your goal): Readability 2/100 (fail) · Harmony 81/100 (triadic) · Distinguishable 87/100 (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 RedCent are very different (ΔE 62). They have distinctly different hues (136° apart) and their lightness is similar, so they read as two same-weight colours.
Sea Green text on RedCent: 1.10:1 (Fail); RedCent text on Sea Green: 1.10:1 (Fail). Neither meets AA at body size — nudging one color to #000C03 clears it.
Triadic — triadic — a recognised, balanced pairing (harmony 81/100). 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 #000C03 clears AA.
Their CIE76 ΔE is about 62 — very different.
clearly different colours (ΔE 62).
Explore each color: Sea Green #3C8D66 · RedCent #AD654C · Shades: Sea Green shades · RedCent shades · Contrast checker →