#FF6E2E

CSS

:root {
  --extreme-carrot: #ff6e2e;
  --extreme-carrot-rgb: 255 110 46;
  --extreme-carrot-oklch: oklch(0.708 0.192 41.6);
}

.element {
  color: var(--extreme-carrot);
  background-color: hsl(18 100% 59%);
  border-color: oklch(0.708 0.192 41.6);
}

Tailwind CSS v4

@theme {
  --color-extreme-carrot: #ff6e2e;
  --color-extreme-carrot-50: #ffe4c9;
  --color-extreme-carrot-100: #ffd4b4;
  --color-extreme-carrot-200: #ffb990;
  --color-extreme-carrot-300: #ff9461;
  --color-extreme-carrot-400: #f86f35;
  --color-extreme-carrot-500: #e74700;
  --color-extreme-carrot-600: #c33e00;
  --color-extreme-carrot-700: #9d3100;
  --color-extreme-carrot-800: #762100;
  --color-extreme-carrot-900: #531600;
  --color-extreme-carrot-950: #370600;
}

SCSS

$extreme-carrot: #ff6e2e;
$extreme-carrot-rgb: 255, 110, 46;
$extreme-carrot-light: mix(#fff, $extreme-carrot, 20%);
$extreme-carrot-dark: mix(#000, $extreme-carrot, 20%);

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