#FF658A

CSS

:root {
  --blush-hour: #ff658a;
  --blush-hour-rgb: 255 101 138;
  --blush-hour-oklch: oklch(0.711 0.189 8.5);
}

.element {
  color: var(--blush-hour);
  background-color: hsl(346 100% 70%);
  border-color: oklch(0.711 0.189 8.5);
}

Tailwind CSS v4

@theme {
  --color-blush-hour: #ff658a;
  --color-blush-hour-50: #ffdfe8;
  --color-blush-hour-100: #ffced9;
  --color-blush-hour-200: #ffb2c1;
  --color-blush-hour-300: #ff8ba0;
  --color-blush-hour-400: #f76688;
  --color-blush-hour-500: #e53a6d;
  --color-blush-hour-600: #c2335c;
  --color-blush-hour-700: #9c294a;
  --color-blush-hour-800: #741c38;
  --color-blush-hour-900: #521326;
  --color-blush-hour-950: #360314;
}

SCSS

$blush-hour: #ff658a;
$blush-hour-rgb: 255, 101, 138;
$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);
}