#347AD8 · #C84A58
Four independent scores (read the one that fits your goal): Readability 2/100 (fail) · Harmony 88/100 (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.
Royal Blue and Indian Red are very different (ΔE 84). They have distinctly different hues (139° apart) and their lightness is similar, so they read as two same-weight colours.
Royal Blue text on Indian Red: 1.08:1 (Fail); Indian Red text on Royal Blue: 1.08:1 (Fail). Neither meets AA at body size — nudging one color to #FBFDFF clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 88/100). 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 #FBFDFF clears AA.
Their CIE76 ΔE is about 84 — very different.
clearly different colours (ΔE 84).
Explore each color: Royal Blue #347AD8 · Indian Red #C84A58 · Shades: Royal Blue shades · Indian Red shades · Contrast checker →