#00154C · #281900
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 96/100 (complementary) · Distinguishable 78/100 (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.
Deep Vivid Blue and Deep Vivid Yellow are very different (ΔE 53). They have near-opposite hues (174° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Vivid Blue text on Deep Vivid Yellow: 1.01:1 (Fail); Deep Vivid Yellow text on Deep Vivid Blue: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #6083C3 clears it.
Complementary — complementary — a recognised, balanced pairing (harmony 96/100). 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 #6083C3 clears AA.
Their CIE76 ΔE is about 53 — very different.
clearly different colours (ΔE 53).
Explore each color: Deep Vivid Blue #00154C · Deep Vivid Yellow #281900 · Shades: Deep Vivid Blue shades · Deep Vivid Yellow shades · Contrast checker →