#594A85 · #7E451B
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 91/100 (triadic) · Distinguishable 89/100 (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 Slate Blue and Walnut are very different (ΔE 66). They have distinctly different hues (130° apart) and their lightness is similar, so they read as two same-weight colours.
Dark Slate Blue text on Walnut: 1.00:1 (Fail); Walnut text on Dark Slate Blue: 1.00:1 (Fail). Neither meets AA at body size — nudging one color to #CCBFFF clears it.
Triadic — triadic — 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 1.0:1, below the 4.5:1 minimum. Nudging one colour to #CCBFFF clears AA.
Their CIE76 ΔE is about 66 — very different.
clearly different colours (ΔE 66).
Explore each color: Dark Slate Blue #594A85 · Walnut #7E451B · Shades: Dark Slate Blue shades · Walnut shades · Contrast checker →