#0000FF · #6E5000
Four independent scores (read the one that fits your goal): Readability 3/100 (fail) · Harmony 89/100 (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.
Blue and Dark Vivid Yellow are very different (ΔE 169). They have near-opposite hues (164° apart) and their lightness is different, giving a clear light/dark split.
Blue text on Dark Vivid Yellow: 1.15:1 (Fail); Dark Vivid Yellow text on Blue: 1.15:1 (Fail). Neither meets AA at body size — nudging one color to #AFCAFF clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 89/100). 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 #AFCAFF clears AA.
Their CIE76 ΔE is about 169 — very different.
clearly different colours (ΔE 169).
Explore each color: Blue #0000FF · Dark Vivid Yellow #6E5000 · Shades: Blue shades · Dark Vivid Yellow shades · Contrast checker →