Proton Red

CSS

:root {
  --proton-red: #840804;
  --proton-red-rgb: 132 8 4;
  --proton-red-oklch: oklch(0.389 0.154 29.3);
}

.element {
  color: var(--proton-red);
  background-color: hsl(2 94% 27%);
  border-color: oklch(0.389 0.154 29.3);
}

Tailwind CSS v4

@theme {
  --color-proton-red: #840804;
  --color-proton-red-50: #ffe6da;
  --color-proton-red-100: #ffd6c9;
  --color-proton-red-200: #ffbcac;
  --color-proton-red-300: #fc9986;
  --color-proton-red-400: #eb7767;
  --color-proton-red-500: #d95545;
  --color-proton-red-600: #b7493c;
  --color-proton-red-700: #933a2f;
  --color-proton-red-800: #6e2923;
  --color-proton-red-900: #4e1b17;
  --color-proton-red-950: #330b08;
}

SCSS

$proton-red: #840804;
$proton-red-rgb: 132, 8, 4;
$proton-red-light: mix(#fff, $proton-red, 20%);
$proton-red-dark: mix(#000, $proton-red, 20%);

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