#EF66D3

CSS

:root {
  --death-of-a-star: #ef66d3;
  --death-of-a-star-rgb: 239 102 211;
  --death-of-a-star-oklch: oklch(0.715 0.208 336.2);
}

.element {
  color: var(--death-of-a-star);
  background-color: hsl(312 81% 67%);
  border-color: oklch(0.715 0.208 336.2);
}

Tailwind CSS v4

@theme {
  --color-death-of-a-star: #ef66d3;
  --color-death-of-a-star-50: #ffdfff;
  --color-death-of-a-star-100: #ffcdff;
  --color-death-of-a-star-200: #ffb1f3;
  --color-death-of-a-star-300: #fa8adc;
  --color-death-of-a-star-400: #e766cc;
  --color-death-of-a-star-500: #d43ab9;
  --color-death-of-a-star-600: #b3339c;
  --color-death-of-a-star-700: #90297d;
  --color-death-of-a-star-800: #6a1d5f;
  --color-death-of-a-star-900: #4b1343;
  --color-death-of-a-star-950: #31042b;
}

SCSS

$death-of-a-star: #ef66d3;
$death-of-a-star-rgb: 239, 102, 211;
$death-of-a-star-light: mix(#fff, $death-of-a-star, 20%);
$death-of-a-star-dark: mix(#000, $death-of-a-star, 20%);

.element {
  color: $death-of-a-star;
  box-shadow: 0 0 0 2px rgba($death-of-a-star, 0.35);
}