#ECF9F5 · #F6F4FF
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 44/100 (clashing) · Distinguishable 7/100 (hard to tell apart) · Match 79/100 (close). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
White Smoke and Ghost White are very close (ΔE 9). They have distinctly different hues (89° apart) and their lightness is similar, so they read as two same-weight colours.
White Smoke text on Ghost White: 1.01:1 (Fail); Ghost White text on White Smoke: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #687370 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 #687370 clears AA.
Their CIE76 ΔE is about 9 — very close.
close but visibly different (ΔE 9.4).
Explore each color: White Smoke #ECF9F5 · Ghost White #F6F4FF · Shades: White Smoke shades · Ghost White shades · Contrast checker →