#8099DA

CSS

:root {
  --wisteria-blue: #8099da;
  --wisteria-blue-rgb: 128 153 218;
  --wisteria-blue-oklch: oklch(0.69 0.1 267.6);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(223 55% 68%);
  border-color: oklch(0.69 0.1 267.6);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #8099da;
  --color-wisteria-blue-50: #e9f5ff;
  --color-wisteria-blue-100: #dae7ff;
  --color-wisteria-blue-200: #c3d3ff;
  --color-wisteria-blue-300: #a3b6ec;
  --color-wisteria-blue-400: #849cda;
  --color-wisteria-blue-500: #6983c9;
  --color-wisteria-blue-600: #596faa;
  --color-wisteria-blue-700: #475988;
  --color-wisteria-blue-800: #324165;
  --color-wisteria-blue-900: #222d47;
  --color-wisteria-blue-950: #111a2e;
}

SCSS

$wisteria-blue: #8099da;
$wisteria-blue-rgb: 128, 153, 218;
$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);
}