#779CD3

CSS

:root {
  --wisteria-blue: #779cd3;
  --wisteria-blue-rgb: 119 156 211;
  --wisteria-blue-oklch: oklch(0.687 0.091 258.1);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(216 51% 65%);
  border-color: oklch(0.687 0.091 258.1);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #779cd3;
  --color-wisteria-blue-50: #e6f6ff;
  --color-wisteria-blue-100: #d7e9ff;
  --color-wisteria-blue-200: #bed6fc;
  --color-wisteria-blue-300: #9cb9e7;
  --color-wisteria-blue-400: #7da0d5;
  --color-wisteria-blue-500: #5f87c2;
  --color-wisteria-blue-600: #5173a4;
  --color-wisteria-blue-700: #415c84;
  --color-wisteria-blue-800: #2d4362;
  --color-wisteria-blue-900: #1e2f45;
  --color-wisteria-blue-950: #0e1b2c;
}

SCSS

$wisteria-blue: #779cd3;
$wisteria-blue-rgb: 119, 156, 211;
$wisteria-blue-light: mix(#fff, $wisteria-blue, 20%);
$wisteria-blue-dark: mix(#000, $wisteria-blue, 20%);

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