#0075F6 · #FFFFFF
Four independent scores (read the one that fits your goal): Readability 57/100 (aa large) · Harmony 100/100 (split-complementary) · Distinguishable 92/100 (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 White are very different (ΔE 90). They have distinctly different hues (149° apart) and their lightness is different, giving a clear light/dark split.
Royal Blue text on White: 4.31:1 (AA Large); White text on Royal Blue: 4.31:1 (AA Large). Neither meets AA at body size — nudging one color to #0072F0 clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 100/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 4.3:1, below the 4.5:1 minimum. Nudging one colour to #0072F0 clears AA.
Their CIE76 ΔE is about 90 — very different.
clearly different colours (ΔE 90).
Explore each color: Royal Blue #0075F6 · White #FFFFFF · Shades: Royal Blue shades · White shades · Contrast checker →