#FF6689

CSS

:root {
  --blush-hour: #ff6689;
  --blush-hour-rgb: 255 102 137;
  --blush-hour-oklch: oklch(0.712 0.188 9.2);
}

.element {
  color: var(--blush-hour);
  background-color: hsl(346 100% 70%);
  border-color: oklch(0.712 0.188 9.2);
}

Tailwind CSS v4

@theme {
  --color-blush-hour: #ff6689;
  --color-blush-hour-50: #ffe0e8;
  --color-blush-hour-100: #ffced8;
  --color-blush-hour-200: #ffb2c0;
  --color-blush-hour-300: #ff8c9f;
  --color-blush-hour-400: #f76687;
  --color-blush-hour-500: #e53b6b;
  --color-blush-hour-600: #c1345b;
  --color-blush-hour-700: #9c2a49;
  --color-blush-hour-800: #741c37;
  --color-blush-hour-900: #521325;
  --color-blush-hour-950: #360414;
}

SCSS

$blush-hour: #ff6689;
$blush-hour-rgb: 255, 102, 137;
$blush-hour-light: mix(#fff, $blush-hour, 20%);
$blush-hour-dark: mix(#000, $blush-hour, 20%);

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