#B2E4D0 · #D5D1FC
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 45/100 (triadic (soft)) · Distinguishable 30/100 (hard to tell apart) · Match 14/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
CrystalRapids and Periwinkle are very different (ΔE 39). They have distinctly different hues (90° apart) and their lightness is similar, so they read as two same-weight colours.
CrystalRapids text on Periwinkle: 1.04:1 (Fail); Periwinkle text on CrystalRapids: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #376555 clears it.
Triadic (soft) — workable but not a textbook harmony (harmony 45/100). 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 #376555 clears AA.
Their CIE76 ΔE is about 39 — very different.
clearly different colours (ΔE 39).
Explore each color: CrystalRapids #B2E4D0 · Periwinkle #D5D1FC · Shades: CrystalRapids shades · Periwinkle shades · Contrast checker →