Post Yellow

CSS

:root {
  --post-yellow: #ffee01;
  --post-yellow-rgb: 255 238 1;
  --post-yellow-oklch: oklch(0.933 0.197 104.3);
}

.element {
  color: var(--post-yellow);
  background-color: hsl(56 100% 50%);
  border-color: oklch(0.933 0.197 104.3);
}

Tailwind CSS v4

@theme {
  --color-post-yellow: #ffee01;
  --color-post-yellow-50: #fcfab8;
  --color-post-yellow-100: #f0ed9f;
  --color-post-yellow-200: #dfda70;
  --color-post-yellow-300: #c5bd25;
  --color-post-yellow-400: #b3a200;
  --color-post-yellow-500: #9e8800;
  --color-post-yellow-600: #857300;
  --color-post-yellow-700: #6b5c00;
  --color-post-yellow-800: #514200;
  --color-post-yellow-900: #382e00;
  --color-post-yellow-950: #231a00;
}

SCSS

$post-yellow: #ffee01;
$post-yellow-rgb: 255, 238, 1;
$post-yellow-light: mix(#fff, $post-yellow, 20%);
$post-yellow-dark: mix(#000, $post-yellow, 20%);

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