#0F1C2F · #11200C
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 93/100 (triadic) · Distinguishable 42/100 (somewhat similar) · Match 39/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Blue and Deep Green are a clear pair (ΔE 28). They have distinctly different hues (111° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Blue text on Deep Green: 1.01:1 (Fail); Deep Green text on Deep Blue: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #74859D clears it.
Triadic — triadic — 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 #74859D clears AA.
Their CIE76 ΔE is about 28 — a clear pair.
clearly different colours (ΔE 28).
Explore each color: Deep Blue #0F1C2F · Deep Green #11200C · Shades: Deep Blue shades · Deep Green shades · Contrast checker →