#5BBDFF · #F78EAE
Four independent scores (read the one that fits your goal): Readability 2/100 (fail) · Harmony 73/100 (split-complementary) · Distinguishable 100/100 (easy to tell apart) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Sky Blue and Light Vivid Red are very different (ΔE 67). They have distinctly different hues (138° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Sky Blue text on Light Vivid Red: 1.08:1 (Fail); Light Vivid Red text on Deep Sky Blue: 1.08:1 (Fail). Neither meets AA at body size — nudging one color to #00466C clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 73/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.1:1, below the 4.5:1 minimum. Nudging one colour to #00466C clears AA.
Their CIE76 ΔE is about 67 — very different.
clearly different colours (ΔE 67).
Explore each color: Deep Sky Blue #5BBDFF · Light Vivid Red #F78EAE · Shades: Deep Sky Blue shades · Light Vivid Red shades · Contrast checker →