#ADD5E4 · #B8D0EC
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 82/100 (analogous) · Distinguishable 6/100 (hard to tell apart) · Match 80/100 (close). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Longitude and Light Blue are very close (ΔE 9). They have closely related hues (16° apart) and their lightness is similar, so they read as two same-weight colours.
Longitude text on Light Blue: 1.01:1 (Fail); Light Blue text on Longitude: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #395D6A clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 82/100). 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 #395D6A clears AA.
Their CIE76 ΔE is about 9 — very close.
close but visibly different (ΔE 9.1).
Explore each color: Longitude #ADD5E4 · Light Blue #B8D0EC · Shades: Longitude shades · Light Blue shades · Contrast checker →