#809CC8

CSS

:root {
  --wisteria-blue: #809cc8;
  --wisteria-blue-rgb: 128 156 200;
  --wisteria-blue-oklch: oklch(0.688 0.072 259.3);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(217 40% 64%);
  border-color: oklch(0.688 0.072 259.3);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #809cc8;
  --color-wisteria-blue-50: #eaf6ff;
  --color-wisteria-blue-100: #dbe9ff;
  --color-wisteria-blue-200: #c3d5f4;
  --color-wisteria-blue-300: #a3b8dd;
  --color-wisteria-blue-400: #85a0ca;
  --color-wisteria-blue-500: #6987b6;
  --color-wisteria-blue-600: #59729a;
  --color-wisteria-blue-700: #475c7c;
  --color-wisteria-blue-800: #32435b;
  --color-wisteria-blue-900: #222e40;
  --color-wisteria-blue-950: #111b29;
}

SCSS

$wisteria-blue: #809cc8;
$wisteria-blue-rgb: 128, 156, 200;
$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);
}