#819BD0

CSS

:root {
  --wisteria-blue: #819bd0;
  --wisteria-blue-rgb: 129 155 208;
  --wisteria-blue-oklch: oklch(0.69 0.084 264.1);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(220 46% 66%);
  border-color: oklch(0.69 0.084 264.1);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #819bd0;
  --color-wisteria-blue-50: #eaf5ff;
  --color-wisteria-blue-100: #dbe8ff;
  --color-wisteria-blue-200: #c4d4f9;
  --color-wisteria-blue-300: #a3b7e3;
  --color-wisteria-blue-400: #859ed1;
  --color-wisteria-blue-500: #6a85be;
  --color-wisteria-blue-600: #5a71a1;
  --color-wisteria-blue-700: #485a81;
  --color-wisteria-blue-800: #324260;
  --color-wisteria-blue-900: #222e43;
  --color-wisteria-blue-950: #111a2b;
}

SCSS

$wisteria-blue: #819bd0;
$wisteria-blue-rgb: 129, 155, 208;
$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);
}