#1D1E01 · #271900
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 96/100 (analogous) · Distinguishable 16/100 (hard to tell apart) · Match 79/100 (close). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Deep Vivid Lime and Deep Vivid Yellow are very close (ΔE 9). They have closely related hues (24° apart) and their lightness is similar, so they read as two same-weight colours.
Deep Vivid Lime text on Deep Vivid Yellow: 1.01:1 (Fail); Deep Vivid Yellow text on Deep Vivid Lime: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #838664 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 #838664 clears AA.
Their CIE76 ΔE is about 9 — very close.
close but visibly different (ΔE 9.4).
Explore each color: Deep Vivid Lime #1D1E01 · Deep Vivid Yellow #271900 · Shades: Deep Vivid Lime shades · Deep Vivid Yellow shades · Contrast checker →