#006911 · #565B00
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 13/100 (clashing) · Distinguishable 77/100 (easy to tell apart) · Match 30/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Dark Green and Deep Vivid Lime are very different (ΔE 32). They have distinctly different hues (66° apart) and their lightness is similar, so they read as two same-weight colours.
Dark Green text on Deep Vivid Lime: 1.05:1 (Fail); Deep Vivid Lime text on Dark Green: 1.05:1 (Fail). Neither meets AA at body size — nudging one color to #89E088 clears it.
Clashing — awkward hue gap — tends to clash (harmony 13/100). 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 #89E088 clears AA.
Their CIE76 ΔE is about 32 — very different.
clearly different colours (ΔE 32).
Explore each color: Dark Green #006911 · Deep Vivid Lime #565B00 · Shades: Dark Green shades · Deep Vivid Lime shades · Contrast checker →