#C3E1BE · #E9CBEE
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 100/100 (complementary) · Distinguishable 31/100 (hard to tell apart) · Match 6/100 (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 43). They have near-opposite hues (180° apart) and their lightness is similar, so they read as two same-weight colours.
Fog text on Periwinkle: 1.04:1 (Fail); Periwinkle text on Fog: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #496345 clears it.
Complementary — complementary — 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 #496345 clears AA.
Their CIE76 ΔE is about 43 — very different.
clearly different colours (ΔE 43).
Explore each color: Fog #C3E1BE · Periwinkle #E9CBEE · Shades: Fog shades · Periwinkle shades · Contrast checker →