#C3DDD6 · #CADCCC
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 95/100 (analogous) · Distinguishable 19/100 (hard to tell apart) · Match 88/100 (close). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
OpalBlue and Fog are very close (ΔE 5). They have distinctly different hues (37° apart) and their lightness is similar, so they read as two same-weight colours.
OpalBlue text on Fog: 1.00:1 (Fail); Fog text on OpalBlue: 1.00:1 (Fail). Neither meets AA at body size — nudging one color to #4B635D clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 95/100). 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 #4B635D clears AA.
Their CIE76 ΔE is about 5 — very close.
close but visibly different (ΔE 5.4).
Explore each color: OpalBlue #C3DDD6 · Fog #CADCCC · Shades: OpalBlue shades · Fog shades · Contrast checker →