#067FCE · #666ED2
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 100/100 (analogous) · Distinguishable 49/100 (somewhat similar) · Match 46/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Vivid Cyan and Slate Blue are a clear pair (ΔE 24). They have distinctly different hues (32° apart) and their lightness is similar, so they read as two same-weight colours.
Vivid Cyan text on Slate Blue: 1.04:1 (Fail); Slate Blue text on Vivid Cyan: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #00071D clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 100/100). 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 #00071D clears AA.
Their CIE76 ΔE is about 24 — a clear pair.
clearly different colours (ΔE 24).
Explore each color: Vivid Cyan #067FCE · Slate Blue #666ED2 · Shades: Vivid Cyan shades · Slate Blue shades · Contrast checker →