#0A202F · #1B210A
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 94/100 (triadic) · Distinguishable 52/100 (somewhat similar) · Match 43/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Cyan and Deep Lime are a clear pair (ΔE 26). They have distinctly different hues (129° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Cyan text on Deep Lime: 1.01:1 (Fail); Deep Lime text on Deep Cyan: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #70899B clears it.
Triadic — triadic — a recognised, balanced pairing (harmony 94/100). 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 #70899B clears AA.
Their CIE76 ΔE is about 26 — a clear pair.
clearly different colours (ΔE 26).
Explore each color: Deep Cyan #0A202F · Deep Lime #1B210A · Shades: Deep Cyan shades · Deep Lime shades · Contrast checker →