First Day of Summer

CSS

:root {
  --first-day-of-summer: #f1e798;
  --first-day-of-summer-rgb: 241 231 152;
  --first-day-of-summer-oklch: oklch(0.918 0.1 101.9);
}

.element {
  color: var(--first-day-of-summer);
  background-color: hsl(53 76% 77%);
  border-color: oklch(0.918 0.1 101.9);
}

Tailwind CSS v4

@theme {
  --color-first-day-of-summer: #f1e798;
  --color-first-day-of-summer-50: #f9f7d7;
  --color-first-day-of-summer-100: #edeac4;
  --color-first-day-of-summer-200: #dbd7a6;
  --color-first-day-of-summer-300: #c0ba7e;
  --color-first-day-of-summer-400: #aaa158;
  --color-first-day-of-summer-500: #94882e;
  --color-first-day-of-summer-600: #7d7329;
  --color-first-day-of-summer-700: #645c21;
  --color-first-day-of-summer-800: #4a4315;
  --color-first-day-of-summer-900: #342e0d;
  --color-first-day-of-summer-950: #1f1b02;
}

SCSS

$first-day-of-summer: #f1e798;
$first-day-of-summer-rgb: 241, 231, 152;
$first-day-of-summer-light: mix(#fff, $first-day-of-summer, 20%);
$first-day-of-summer-dark: mix(#000, $first-day-of-summer, 20%);

.element {
  color: $first-day-of-summer;
  box-shadow: 0 0 0 2px rgba($first-day-of-summer, 0.35);
}