Sour Yellow

CSS

:root {
  --sour-yellow: #eeff04;
  --sour-yellow-rgb: 238 255 4;
  --sour-yellow-oklch: oklch(0.955 0.215 114.6);
}

.element {
  color: var(--sour-yellow);
  background-color: hsl(64 100% 51%);
  border-color: oklch(0.955 0.215 114.6);
}

Tailwind CSS v4

@theme {
  --color-sour-yellow: #eeff04;
  --color-sour-yellow-50: #f1feb7;
  --color-sour-yellow-100: #e3f29e;
  --color-sour-yellow-200: #cfe06f;
  --color-sour-yellow-300: #b1c41f;
  --color-sour-yellow-400: #9eaa00;
  --color-sour-yellow-500: #879100;
  --color-sour-yellow-600: #727b00;
  --color-sour-yellow-700: #5b6300;
  --color-sour-yellow-800: #454700;
  --color-sour-yellow-900: #303100;
  --color-sour-yellow-950: #1c1d00;
}

SCSS

$sour-yellow: #eeff04;
$sour-yellow-rgb: 238, 255, 4;
$sour-yellow-light: mix(#fff, $sour-yellow, 20%);
$sour-yellow-dark: mix(#000, $sour-yellow, 20%);

.element {
  color: $sour-yellow;
  box-shadow: 0 0 0 2px rgba($sour-yellow, 0.35);
}