#59468F · #733C7A
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 94/100 (analogous) · Distinguishable 49/100 (somewhat similar) · Match 67/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Dark Slate Blue and Dusty Purple are a clear pair (ΔE 15). They have distinctly different hues (38° apart) and their lightness is similar, so they read as two same-weight colours.
Dark Slate Blue text on Dusty Purple: 1.02:1 (Fail); Dusty Purple text on Dark Slate Blue: 1.02:1 (Fail). Neither meets AA at body size — nudging one color to #C8BBFF clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 94/100). 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 #C8BBFF clears AA.
Their CIE76 ΔE is about 15 — a clear pair.
clearly different colours (ΔE 15).
Explore each color: Dark Slate Blue #59468F · Dusty Purple #733C7A · Shades: Dark Slate Blue shades · Dusty Purple shades · Contrast checker →