#C79125

CSS

:root {
  --end-of-summer: #c79125;
  --end-of-summer-rgb: 199 145 37;
  --end-of-summer-oklch: oklch(0.692 0.132 79.5);
}

.element {
  color: var(--end-of-summer);
  background-color: hsl(40 69% 46%);
  border-color: oklch(0.692 0.132 79.5);
}

Tailwind CSS v4

@theme {
  --color-end-of-summer: #c79125;
  --color-end-of-summer-50: #fff2cb;
  --color-end-of-summer-100: #ffe4b6;
  --color-end-of-summer-200: #f1cf93;
  --color-end-of-summer-300: #dab165;
  --color-end-of-summer-400: #c89434;
  --color-end-of-summer-500: #b47900;
  --color-end-of-summer-600: #986700;
  --color-end-of-summer-700: #7a5200;
  --color-end-of-summer-800: #5b3b00;
  --color-end-of-summer-900: #402900;
  --color-end-of-summer-950: #291600;
}

SCSS

$end-of-summer: #c79125;
$end-of-summer-rgb: 199, 145, 37;
$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);
}