#3D9300 · #E11D48
Four independent scores (read the one that fits your goal): Readability 4/100 (fail) · Harmony 83/100 (triadic) · Distinguishable 51/100 (somewhat similar) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Basil and Crimson are very different (ΔE 123). They have distinctly different hues (108° apart) and their lightness is different, giving a clear light/dark split.
Basil text on Crimson: 1.20:1 (Fail); Crimson text on Basil: 1.20:1 (Fail). Neither meets AA at body size — nudging one color to #EFFFE9 clears it.
Triadic — triadic — a recognised, balanced pairing (harmony 83/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.2:1, below the 4.5:1 minimum. Nudging one colour to #EFFFE9 clears AA.
Their CIE76 ΔE is about 123 — very different.
clearly different colours (ΔE 123).
Explore each color: Basil #3D9300 · Crimson #E11D48 · Shades: Basil shades · Crimson shades · Contrast checker →