#565C00 · #5A4989
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 89/100 (complementary) · Distinguishable 81/100 (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 85). They have near-opposite hues (168° apart) and their lightness is different, giving a clear light/dark split.
Dark Olive Green text on Dark Slate Blue: 1.06:1 (Fail); Dark Slate Blue text on Dark Olive Green: 1.06:1 (Fail). Neither meets AA at body size — nudging one color to #C4CD7E clears it.
Complementary — complementary — a recognised, balanced pairing (harmony 89/100). 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 #C4CD7E clears AA.
Their CIE76 ΔE is about 85 — very different.
clearly different colours (ΔE 85).
Explore each color: Dark Olive Green #565C00 · Dark Slate Blue #5A4989 · Shades: Dark Olive Green shades · Dark Slate Blue shades · Contrast checker →