#C88F00

CSS

:root {
  --end-of-summer: #c88f00;
  --end-of-summer-rgb: 200 143 0;
  --end-of-summer-oklch: oklch(0.688 0.142 80.2);
}

.element {
  color: var(--end-of-summer);
  background-color: hsl(43 100% 39%);
  border-color: oklch(0.688 0.142 80.2);
}

Tailwind CSS v4

@theme {
  --color-end-of-summer: #c88f00;
  --color-end-of-summer-50: #fff2c8;
  --color-end-of-summer-100: #ffe4b2;
  --color-end-of-summer-200: #f3cf8d;
  --color-end-of-summer-300: #dcb05c;
  --color-end-of-summer-400: #ca9423;
  --color-end-of-summer-500: #b67800;
  --color-end-of-summer-600: #9a6600;
  --color-end-of-summer-700: #7b5200;
  --color-end-of-summer-800: #5d3a00;
  --color-end-of-summer-900: #412800;
  --color-end-of-summer-950: #291600;
}

SCSS

$end-of-summer: #c88f00;
$end-of-summer-rgb: 200, 143, 0;
$end-of-summer-light: mix(#fff, $end-of-summer, 20%);
$end-of-summer-dark: mix(#000, $end-of-summer, 20%);

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