#5E7EF2 · #DF5444
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 77/100 (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.
Vivid Blue and Indian Red are very different (ΔE 104). They have distinctly different hues (139° apart) and their lightness is similar, so they read as two same-weight colours.
Vivid Blue text on Indian Red: 1.05:1 (Fail); Indian Red text on Vivid Blue: 1.05:1 (Fail). Neither meets AA at body size — nudging one color to #0C0069 clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 77/100). 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 #0C0069 clears AA.
Their CIE76 ΔE is about 104 — very different.
clearly different colours (ΔE 104).
Explore each color: Vivid Blue #5E7EF2 · Indian Red #DF5444 · Shades: Vivid Blue shades · Indian Red shades · Contrast checker →