#C6C8CD · #CDC6C5
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 97/100 (split-complementary) · Distinguishable 18/100 (hard to tell apart) · Match 90/100 (near match). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Silver and Alto are very close (ΔE 5). They have distinctly different hues (145° apart) and their lightness is similar, so they read as two same-weight colours.
Silver text on Alto: 1.01:1 (Fail); Alto text on Silver: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #525458 clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 97/100). 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 #525458 clears AA.
Their CIE76 ΔE is about 5 — very close.
a very near match (ΔE 4.6) — fine for most matching.
Explore each color: Silver #C6C8CD · Alto #CDC6C5 · Shades: Silver shades · Alto shades · Contrast checker →