British Phone Booth

CSS

:root {
  --british-phone-booth: #ff0015;
  --british-phone-booth-rgb: 255 0 21;
  --british-phone-booth-oklch: oklch(0.629 0.257 27.9);
}

.element {
  color: var(--british-phone-booth);
  background-color: hsl(355 100% 50%);
  border-color: oklch(0.629 0.257 27.9);
}

Tailwind CSS v4

@theme {
  --color-british-phone-booth: #ff0015;
  --color-british-phone-booth-50: #ffdaca;
  --color-british-phone-booth-100: #ffc7b5;
  --color-british-phone-booth-200: #ffa791;
  --color-british-phone-booth-300: #ff7963;
  --color-british-phone-booth-400: #ff443c;
  --color-british-phone-booth-500: #ff0000;
  --color-british-phone-booth-600: #dd0000;
  --color-british-phone-booth-700: #b20000;
  --color-british-phone-booth-800: #850005;
  --color-british-phone-booth-900: #5f0004;
  --color-british-phone-booth-950: #400000;
}

SCSS

$british-phone-booth: #ff0015;
$british-phone-booth-rgb: 255, 0, 21;
$british-phone-booth-light: mix(#fff, $british-phone-booth, 20%);
$british-phone-booth-dark: mix(#000, $british-phone-booth, 20%);

.element {
  color: $british-phone-booth;
  box-shadow: 0 0 0 2px rgba($british-phone-booth, 0.35);
}