#779AE4

CSS

:root {
  --wisteria-blue: #779ae4;
  --wisteria-blue-rgb: 119 154 228;
  --wisteria-blue-oklch: oklch(0.691 0.116 264.3);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(221 67% 68%);
  border-color: oklch(0.691 0.116 264.3);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #779ae4;
  --color-wisteria-blue-50: #e6f5ff;
  --color-wisteria-blue-100: #d6e8ff;
  --color-wisteria-blue-200: #bdd4ff;
  --color-wisteria-blue-300: #9cb6f4;
  --color-wisteria-blue-400: #7c9de4;
  --color-wisteria-blue-500: #5f83d3;
  --color-wisteria-blue-600: #506fb2;
  --color-wisteria-blue-700: #40598f;
  --color-wisteria-blue-800: #2c416b;
  --color-wisteria-blue-900: #1e2d4b;
  --color-wisteria-blue-950: #0e1a31;
}

SCSS

$wisteria-blue: #779ae4;
$wisteria-blue-rgb: 119, 154, 228;
$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);
}