Fluorescent Orange

CSS

:root {
  --fluorescent-orange: #ffcf00;
  --fluorescent-orange-rgb: 255 207 0;
  --fluorescent-orange-oklch: oklch(0.871 0.178 91.8);
}

.element {
  color: var(--fluorescent-orange);
  background-color: hsl(49 100% 50%);
  border-color: oklch(0.871 0.178 91.8);
}

Tailwind CSS v4

@theme {
  --color-fluorescent-orange: #ffcf00;
  --color-fluorescent-orange-50: #fff5bb;
  --color-fluorescent-orange-100: #fbe8a3;
  --color-fluorescent-orange-200: #edd377;
  --color-fluorescent-orange-300: #d6b537;
  --color-fluorescent-orange-400: #c59800;
  --color-fluorescent-orange-500: #b17d00;
  --color-fluorescent-orange-600: #956a00;
  --color-fluorescent-orange-700: #785500;
  --color-fluorescent-orange-800: #5a3d00;
  --color-fluorescent-orange-900: #3f2a00;
  --color-fluorescent-orange-950: #281700;
}

SCSS

$fluorescent-orange: #ffcf00;
$fluorescent-orange-rgb: 255, 207, 0;
$fluorescent-orange-light: mix(#fff, $fluorescent-orange, 20%);
$fluorescent-orange-dark: mix(#000, $fluorescent-orange, 20%);

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