#A5E1C4 · #CACCFF
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 44/100 (clashing) · Distinguishable 39/100 (hard to tell apart) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
ReefGreen and Periwinkle are very different (ΔE 48). They have distinctly different hues (87° apart) and their lightness is similar, so they read as two same-weight colours.
ReefGreen text on Periwinkle: 1.04:1 (Fail); Periwinkle text on ReefGreen: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #29644B clears it.
Clashing — awkward hue gap — tends to clash (harmony 44/100). 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 #29644B clears AA.
Their CIE76 ΔE is about 48 — very different.
clearly different colours (ΔE 48).
Explore each color: ReefGreen #A5E1C4 · Periwinkle #CACCFF · Shades: ReefGreen shades · Periwinkle shades · Contrast checker →