#8FA9DE

CSS

:root {
  --wisteria-blue: #8fa9de;
  --wisteria-blue-rgb: 143 169 222;
  --wisteria-blue-oklch: oklch(0.735 0.083 264.2);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(220 54% 72%);
  border-color: oklch(0.735 0.083 264.2);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #8fa9de;
  --color-wisteria-blue-50: #eaf5ff;
  --color-wisteria-blue-100: #dbe8ff;
  --color-wisteria-blue-200: #c4d4f9;
  --color-wisteria-blue-300: #a4b7e3;
  --color-wisteria-blue-400: #869ed0;
  --color-wisteria-blue-500: #6a85bd;
  --color-wisteria-blue-600: #5a71a0;
  --color-wisteria-blue-700: #485a80;
  --color-wisteria-blue-800: #33425f;
  --color-wisteria-blue-900: #222e43;
  --color-wisteria-blue-950: #121a2b;
}

SCSS

$wisteria-blue: #8fa9de;
$wisteria-blue-rgb: 143, 169, 222;
$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);
}