#DD6D59

CSS

:root {
  --phoenix-red: #dd6d59;
  --phoenix-red-rgb: 221 109 89;
  --phoenix-red-oklch: oklch(0.663 0.144 31.6);
}

.element {
  color: var(--phoenix-red);
  background-color: hsl(9 66% 61%);
  border-color: oklch(0.663 0.144 31.6);
}

Tailwind CSS v4

@theme {
  --color-phoenix-red: #dd6d59;
  --color-phoenix-red-50: #ffe7db;
  --color-phoenix-red-100: #ffd7c9;
  --color-phoenix-red-200: #ffbeac;
  --color-phoenix-red-300: #f89b86;
  --color-phoenix-red-400: #e77b67;
  --color-phoenix-red-500: #d45a45;
  --color-phoenix-red-600: #b34d3c;
  --color-phoenix-red-700: #903e2f;
  --color-phoenix-red-800: #6c2b23;
  --color-phoenix-red-900: #4c1d17;
  --color-phoenix-red-950: #320d08;
}

SCSS

$phoenix-red: #dd6d59;
$phoenix-red-rgb: 221, 109, 89;
$phoenix-red-light: mix(#fff, $phoenix-red, 20%);
$phoenix-red-dark: mix(#000, $phoenix-red, 20%);

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