#4580B6 · #6D75B8
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 97/100 (analogous) · Distinguishable 42/100 (somewhat similar) · Match 63/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Steel Blue and Dusty Blue are a clear pair (ΔE 17). They have closely related hues (25° apart) and their lightness is similar, so they read as two same-weight colours.
Steel Blue text on Dusty Blue: 1.03:1 (Fail); Dusty Blue text on Steel Blue: 1.03:1 (Fail). Neither meets AA at body size — nudging one color to #000D24 clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 97/100). 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 #000D24 clears AA.
Their CIE76 ΔE is about 17 — a clear pair.
clearly different colours (ΔE 17).
Explore each color: Steel Blue #4580B6 · Dusty Blue #6D75B8 · Shades: Steel Blue shades · Dusty Blue shades · Contrast checker →