#8397E3

CSS

:root {
  --wisteria-blue: #8397e3;
  --wisteria-blue-rgb: 131 151 227;
  --wisteria-blue-oklch: oklch(0.692 0.114 271.9);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(228 63% 70%);
  border-color: oklch(0.692 0.114 271.9);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #8397e3;
  --color-wisteria-blue-50: #eaf4ff;
  --color-wisteria-blue-100: #dbe6ff;
  --color-wisteria-blue-200: #c4d1ff;
  --color-wisteria-blue-300: #a5b4f2;
  --color-wisteria-blue-400: #879ae2;
  --color-wisteria-blue-500: #6c80d2;
  --color-wisteria-blue-600: #5b6cb1;
  --color-wisteria-blue-700: #49578e;
  --color-wisteria-blue-800: #33406a;
  --color-wisteria-blue-900: #232c4b;
  --color-wisteria-blue-950: #121931;
}

SCSS

$wisteria-blue: #8397e3;
$wisteria-blue-rgb: 131, 151, 227;
$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);
}