#B1D5C0 · #C4C8EA
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 43/100 (clashing) · Distinguishable 26/100 (hard to tell apart) · Match 30/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Fog and Periwinkle are very different (ΔE 32). They have distinctly different hues (89° apart) and their lightness is similar, so they read as two same-weight colours.
Fog text on Periwinkle: 1.03:1 (Fail); Periwinkle text on Fog: 1.03:1 (Fail). Neither meets AA at body size — nudging one color to #3C5C4B clears it.
Clashing — awkward hue gap — tends to clash (harmony 43/100). 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 #3C5C4B clears AA.
Their CIE76 ΔE is about 32 — very different.
clearly different colours (ΔE 32).
Explore each color: Fog #B1D5C0 · Periwinkle #C4C8EA · Shades: Fog shades · Periwinkle shades · Contrast checker →