Buttercup

CSS

:root {
  --buttercup: #da9429;
  --buttercup-rgb: 218 148 41;
  --buttercup-oklch: oklch(0.72 0.141 72.2);
}

.element {
  color: var(--buttercup);
  background-color: hsl(36 71% 51%);
  border-color: oklch(0.72 0.141 72.2);
}

Tailwind CSS v4

@theme {
  --color-buttercup: #da9429;
  --color-buttercup-50: #fff0c9;
  --color-buttercup-100: #ffe2b4;
  --color-buttercup-200: #f9cc90;
  --color-buttercup-300: #e2ac60;
  --color-buttercup-400: #d18f2d;
  --color-buttercup-500: #be7300;
  --color-buttercup-600: #a06100;
  --color-buttercup-700: #814e00;
  --color-buttercup-800: #603800;
  --color-buttercup-900: #442600;
  --color-buttercup-950: #2c1400;
}

SCSS

$buttercup: #da9429;
$buttercup-rgb: 218, 148, 41;
$buttercup-light: mix(#fff, $buttercup, 20%);
$buttercup-dark: mix(#000, $buttercup, 20%);

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