#04405A · #283960
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 96/100 (analogous) · Distinguishable 26/100 (hard to tell apart) · Match 69/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Vivid Cyan and Dark Dusty Blue are a clear pair (ΔE 14). They have closely related hues (24° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Vivid Cyan text on Dark Dusty Blue: 1.02:1 (Fail); Dark Dusty Blue text on Deep Vivid Cyan: 1.02:1 (Fail). Neither meets AA at body size — nudging one color to #75AAC8 clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 96/100). 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 #75AAC8 clears AA.
Their CIE76 ΔE is about 14 — a clear pair.
clearly different colours (ΔE 14).
Explore each color: Deep Vivid Cyan #04405A · Dark Dusty Blue #283960 · Shades: Deep Vivid Cyan shades · Dark Dusty Blue shades · Contrast checker →