Cross My Heart

CSS

:root {
  --cross-my-heart: #ad2a2d;
  --cross-my-heart-rgb: 173 42 45;
  --cross-my-heart-oklch: oklch(0.495 0.167 24.7);
}

.element {
  color: var(--cross-my-heart);
  background-color: hsl(359 61% 42%);
  border-color: oklch(0.495 0.167 24.7);
}

Tailwind CSS v4

@theme {
  --color-cross-my-heart: #ad2a2d;
  --color-cross-my-heart-50: #ffe4dc;
  --color-cross-my-heart-100: #ffd3ca;
  --color-cross-my-heart-200: #ffb8ae;
  --color-cross-my-heart-300: #ff9489;
  --color-cross-my-heart-400: #f1716b;
  --color-cross-my-heart-500: #df4c4a;
  --color-cross-my-heart-600: #bd4140;
  --color-cross-my-heart-700: #983433;
  --color-cross-my-heart-800: #712426;
  --color-cross-my-heart-900: #501819;
  --color-cross-my-heart-950: #35080a;
}

SCSS

$cross-my-heart: #ad2a2d;
$cross-my-heart-rgb: 173, 42, 45;
$cross-my-heart-light: mix(#fff, $cross-my-heart, 20%);
$cross-my-heart-dark: mix(#000, $cross-my-heart, 20%);

.element {
  color: $cross-my-heart;
  box-shadow: 0 0 0 2px rgba($cross-my-heart, 0.35);
}