#0000FF · #6700CF
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 100/100 (analogous) · Distinguishable 71/100 (easy to tell apart) · Match 35/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Blue and Vivid Indigo are a clear pair (ΔE 29). They have distinctly different hues (30° apart) and their lightness is similar, so they read as two same-weight colours.
Blue text on Vivid Indigo: 1.01:1 (Fail); Vivid Indigo text on Blue: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #9DBDFF clears it.
Analogous — analogous — 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 1.0:1, below the 4.5:1 minimum. Nudging one colour to #9DBDFF clears AA.
Their CIE76 ΔE is about 29 — a clear pair.
clearly different colours (ΔE 29).
Explore each color: Blue #0000FF · Vivid Indigo #6700CF · Shades: Blue shades · Vivid Indigo shades · Contrast checker →