#00154C · #200948
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 93/100 (analogous) · Distinguishable 40/100 (somewhat similar) · Match 76/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Vivid Blue and Deep Indigo are a clear pair (ΔE 11). They have distinctly different hues (38° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Vivid Blue text on Deep Indigo: 1.01:1 (Fail); Deep Indigo text on Deep Vivid Blue: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #5E81C0 clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 93/100). 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 #5E81C0 clears AA.
Their CIE76 ΔE is about 11 — a clear pair.
clearly different colours (ΔE 11).
Explore each color: Deep Vivid Blue #00154C · Deep Indigo #200948 · Shades: Deep Vivid Blue shades · Deep Indigo shades · Contrast checker →