#809AD4

CSS

:root {
  --wisteria-blue: #809ad4;
  --wisteria-blue-rgb: 128 154 212;
  --wisteria-blue-oklch: oklch(0.689 0.091 265.5);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(221 49% 67%);
  border-color: oklch(0.689 0.091 265.5);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #809ad4;
  --color-wisteria-blue-50: #eaf5ff;
  --color-wisteria-blue-100: #dae8ff;
  --color-wisteria-blue-200: #c3d4fc;
  --color-wisteria-blue-300: #a3b7e7;
  --color-wisteria-blue-400: #859ed5;
  --color-wisteria-blue-500: #6984c3;
  --color-wisteria-blue-600: #5970a4;
  --color-wisteria-blue-700: #475a84;
  --color-wisteria-blue-800: #324262;
  --color-wisteria-blue-900: #222d45;
  --color-wisteria-blue-950: #111a2d;
}

SCSS

$wisteria-blue: #809ad4;
$wisteria-blue-rgb: 128, 154, 212;
$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);
}