#C93330

CSS

:root {
  --persian-red: #c93330;
  --persian-red-rgb: 201 51 48;
  --persian-red-oklch: oklch(0.554 0.187 26.7);
}

.element {
  color: var(--persian-red);
  background-color: hsl(1 61% 49%);
  border-color: oklch(0.554 0.187 26.7);
}

Tailwind CSS v4

@theme {
  --color-persian-red: #c93330;
  --color-persian-red-50: #ffe2d7;
  --color-persian-red-100: #ffd1c4;
  --color-persian-red-200: #ffb5a6;
  --color-persian-red-300: #ff8f7f;
  --color-persian-red-400: #f96a60;
  --color-persian-red-500: #e83f3b;
  --color-persian-red-600: #c43833;
  --color-persian-red-700: #9e2d29;
  --color-persian-red-800: #761e1f;
  --color-persian-red-900: #531414;
  --color-persian-red-950: #370406;
}

SCSS

$persian-red: #c93330;
$persian-red-rgb: 201, 51, 48;
$persian-red-light: mix(#fff, $persian-red, 20%);
$persian-red-dark: mix(#000, $persian-red, 20%);

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