#51CF93 · #96C55F
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 31/100 (clashing) · Distinguishable 76/100 (easy to tell apart) · Match 32/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Eucalyptus and Yellow Green are very different (ΔE 31). They have distinctly different hues (64° apart) and their lightness is similar, so they read as two same-weight colours.
Eucalyptus text on Yellow Green: 1.02:1 (Fail); Yellow Green text on Eucalyptus: 1.02:1 (Fail). Neither meets AA at body size — nudging one color to #005434 clears it.
Clashing — awkward hue gap — tends to clash (harmony 31/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.0:1, below the 4.5:1 minimum. Nudging one colour to #005434 clears AA.
Their CIE76 ΔE is about 31 — very different.
clearly different colours (ΔE 31).
Explore each color: Eucalyptus #51CF93 · Yellow Green #96C55F · Shades: Eucalyptus shades · Yellow Green shades · Contrast checker →