#99AA3F · #C29926
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 98/100 (analogous) · Distinguishable 55/100 (somewhat similar) · Match 40/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Lime and Yellow are a clear pair (ΔE 27). They have distinctly different hues (25° apart) and their lightness is similar, so they read as two same-weight colours.
Lime text on Yellow: 1.04:1 (Fail); Yellow text on Lime: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #333A00 clears it.
Analogous — analogous — a recognised, balanced pairing (harmony 98/100). 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 #333A00 clears AA.
Their CIE76 ΔE is about 27 — a clear pair.
clearly different colours (ΔE 27).
Explore each color: Lime #99AA3F · Yellow #C29926 · Shades: Lime shades · Yellow shades · Contrast checker →