Thick Yellow

CSS

:root {
  --thick-yellow: #f1d512;
  --thick-yellow-rgb: 241 213 18;
  --thick-yellow-oklch: oklch(0.87 0.178 99.5);
}

.element {
  color: var(--thick-yellow);
  background-color: hsl(52 89% 51%);
  border-color: oklch(0.87 0.178 99.5);
}

Tailwind CSS v4

@theme {
  --color-thick-yellow: #f1d512;
  --color-thick-yellow-50: #fff8bd;
  --color-thick-yellow-100: #f4eba5;
  --color-thick-yellow-200: #e4d77a;
  --color-thick-yellow-300: #cbba3b;
  --color-thick-yellow-400: #b99e00;
  --color-thick-yellow-500: #a48400;
  --color-thick-yellow-600: #8b7000;
  --color-thick-yellow-700: #6f5a00;
  --color-thick-yellow-800: #544000;
  --color-thick-yellow-900: #3a2d00;
  --color-thick-yellow-950: #251900;
}

SCSS

$thick-yellow: #f1d512;
$thick-yellow-rgb: 241, 213, 18;
$thick-yellow-light: mix(#fff, $thick-yellow, 20%);
$thick-yellow-dark: mix(#000, $thick-yellow, 20%);

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