#839BCE

CSS

:root {
  --wisteria-blue: #839bce;
  --wisteria-blue-rgb: 131 155 206;
  --wisteria-blue-oklch: oklch(0.69 0.08 264.9);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(221 43% 66%);
  border-color: oklch(0.69 0.08 264.9);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #839bce;
  --color-wisteria-blue-50: #ebf5ff;
  --color-wisteria-blue-100: #dce8ff;
  --color-wisteria-blue-200: #c5d4f8;
  --color-wisteria-blue-300: #a5b7e2;
  --color-wisteria-blue-400: #879ecf;
  --color-wisteria-blue-500: #6c85bc;
  --color-wisteria-blue-600: #5c719f;
  --color-wisteria-blue-700: #495a7f;
  --color-wisteria-blue-800: #33425e;
  --color-wisteria-blue-900: #232e42;
  --color-wisteria-blue-950: #121a2b;
}

SCSS

$wisteria-blue: #839bce;
$wisteria-blue-rgb: 131, 155, 206;
$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);
}