#565B0C · #594A86
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 91/100 (complementary) · Distinguishable 78/100 (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.
Dark Olive Green and Dark Slate Blue are very different (ΔE 79). They have near-opposite hues (169° apart) and their lightness is different, giving a clear light/dark split.
Dark Olive Green text on Dark Slate Blue: 1.05:1 (Fail); Dark Slate Blue text on Dark Olive Green: 1.05:1 (Fail). Neither meets AA at body size — nudging one color to #C5CD83 clears it.
Complementary — complementary — a recognised, balanced pairing (harmony 91/100). 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 #C5CD83 clears AA.
Their CIE76 ΔE is about 79 — very different.
clearly different colours (ΔE 79).
Explore each color: Dark Olive Green #565B0C · Dark Slate Blue #594A86 · Shades: Dark Olive Green shades · Dark Slate Blue shades · Contrast checker →