#081B42 · #20143F
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 96/100 (analogous) · Distinguishable 34/100 (hard to tell apart) · Match 80/100 (close). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Blue and Deep Indigo are very close (ΔE 9). They have distinctly different hues (36° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Blue text on Deep Indigo: 1.01:1 (Fail); Deep Indigo text on Deep Blue: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #6A84B3 clears it.
Analogous — analogous — 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 #6A84B3 clears AA.
Their CIE76 ΔE is about 9 — very close.
close but visibly different (ΔE 9.2).
Explore each color: Deep Blue #081B42 · Deep Indigo #20143F · Shades: Deep Blue shades · Deep Indigo shades · Contrast checker →