#A9C9D7 · #FFFFFF
Four independent scores (read the one that fits your goal): Readability 15/100 (fail) · Harmony 93/100 (split-complementary) · Distinguishable 63/100 (somewhat similar) · Match 46/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
VastSky and White are a clear pair (ΔE 25). They have near-opposite hues (162° apart) and their lightness is different, giving a clear light/dark split.
VastSky text on White: 1.75:1 (Fail); White text on VastSky: 1.75:1 (Fail). Neither meets AA at body size — nudging one color to #5E7B88 clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 93/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.7:1, below the 4.5:1 minimum. Nudging one colour to #5E7B88 clears AA.
Their CIE76 ΔE is about 25 — a clear pair.
clearly different colours (ΔE 25).
Explore each color: VastSky #A9C9D7 · White #FFFFFF · Shades: VastSky shades · White shades · Contrast checker →