#3A5489 · #584A84
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 98/100 (analogous) · Distinguishable 42/100 (somewhat similar) · Match 71/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Dusty Blue and Dark Slate Blue are a clear pair (ΔE 13). They have distinctly different hues (34° apart) and their lightness is similar, so they read as two same-weight colours.
Dusty Blue text on Dark Slate Blue: 1.03:1 (Fail); Dark Slate Blue text on Dusty Blue: 1.03:1 (Fail). Neither meets AA at body size — nudging one color to #A9C7FF clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 98/100). 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 #A9C7FF clears AA.
Their CIE76 ΔE is about 13 — a clear pair.
clearly different colours (ΔE 13).
Explore each color: Dusty Blue #3A5489 · Dark Slate Blue #584A84 · Shades: Dusty Blue shades · Dark Slate Blue shades · Contrast checker →