#5F7FEE · #FFFFFF
Four independent scores (read the one that fits your goal): Readability 49/100 (aa large) · Harmony 92/100 (triadic) · Distinguishable 84/100 (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.
Blue and White are very different (ΔE 77). They have distinctly different hues (133° apart) and their lightness is different, giving a clear light/dark split.
Blue text on White: 3.65:1 (AA Large); White text on Blue: 3.65:1 (AA Large). Neither meets AA at body size — nudging one color to #516FDC clears it.
Triadic — triadic — a recognised, balanced pairing (harmony 92/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 3.6:1, below the 4.5:1 minimum. Nudging one colour to #516FDC clears AA.
Their CIE76 ΔE is about 77 — very different.
clearly different colours (ΔE 77).
Explore each color: Blue #5F7FEE · White #FFFFFF · Shades: Blue shades · White shades · Contrast checker →