#210F43 · #300735
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 99/100 (analogous) · Distinguishable 41/100 (somewhat similar) · Match 77/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Indigo and Deep Purple are a clear pair (ΔE 11). They have distinctly different hues (33° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Indigo text on Deep Purple: 1.01:1 (Fail); Deep Purple text on Deep Indigo: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #8779B6 clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 99/100). 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 #8779B6 clears AA.
Their CIE76 ΔE is about 11 — a clear pair.
clearly different colours (ΔE 11).
Explore each color: Deep Indigo #210F43 · Deep Purple #300735 · Shades: Deep Indigo shades · Deep Purple shades · Contrast checker →