#9BE2E5 · #E8C5F1
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 83/100 (triadic) · Distinguishable 55/100 (somewhat similar) · Match 7/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Powder Blue and Periwinkle are very different (ΔE 42). They have distinctly different hues (105° apart) and their lightness is similar, so they read as two same-weight colours.
Powder Blue text on Periwinkle: 1.05:1 (Fail); Periwinkle text on Powder Blue: 1.05:1 (Fail). Neither meets AA at body size — nudging one color to #176367 clears it.
Triadic — triadic — a recognised, balanced pairing (harmony 83/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.1:1, below the 4.5:1 minimum. Nudging one colour to #176367 clears AA.
Their CIE76 ΔE is about 42 — very different.
clearly different colours (ΔE 42).
Explore each color: Powder Blue #9BE2E5 · Periwinkle #E8C5F1 · Shades: Powder Blue shades · Periwinkle shades · Contrast checker →