#A159FF · #FFFFFF
Four independent scores (read the one that fits your goal): Readability 52/100 (aa large) · Harmony 62/100 (triadic (soft)) · Distinguishable 74/100 (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.
Vivid Indigo and White are very different (ΔE 105). They have distinctly different hues (94° apart) and their lightness is different, giving a clear light/dark split.
Vivid Indigo text on White: 3.90:1 (AA Large); White text on Vivid Indigo: 3.90:1 (AA Large). Neither meets AA at body size — nudging one color to #964DF3 clears it.
Triadic (soft) — workable but not a textbook harmony (harmony 62/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 3.9:1, below the 4.5:1 minimum. Nudging one colour to #964DF3 clears AA.
Their CIE76 ΔE is about 105 — very different.
clearly different colours (ΔE 105).
Explore each color: Vivid Indigo #A159FF · White #FFFFFF · Shades: Vivid Indigo shades · White shades · Contrast checker →