#0A202C · #151D2F
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 91/100 (analogous) · Distinguishable 13/100 (hard to tell apart) · Match 85/100 (close). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Cyan and Deep Dusty Blue are very close (ΔE 7). They have closely related hues (20° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Cyan text on Deep Dusty Blue: 1.01:1 (Fail); Deep Dusty Blue text on Deep Cyan: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #6F8897 clears it.
Analogous — analogous — 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 #6F8897 clears AA.
Their CIE76 ΔE is about 7 — very close.
close but visibly different (ΔE 7.0).
Explore each color: Deep Cyan #0A202C · Deep Dusty Blue #151D2F · Shades: Deep Cyan shades · Deep Dusty Blue shades · Contrast checker →