#789AE2

CSS

:root {
  --wisteria-blue: #789ae2;
  --wisteria-blue-rgb: 120 154 226;
  --wisteria-blue-oklch: oklch(0.691 0.113 264.3);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(221 65% 68%);
  border-color: oklch(0.691 0.113 264.3);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #789ae2;
  --color-wisteria-blue-50: #e6f5ff;
  --color-wisteria-blue-100: #d6e8ff;
  --color-wisteria-blue-200: #bed4ff;
  --color-wisteria-blue-300: #9db6f2;
  --color-wisteria-blue-400: #7d9de2;
  --color-wisteria-blue-500: #6084d1;
  --color-wisteria-blue-600: #516fb0;
  --color-wisteria-blue-700: #41598e;
  --color-wisteria-blue-800: #2d4269;
  --color-wisteria-blue-900: #1e2d4a;
  --color-wisteria-blue-950: #0e1a31;
}

SCSS

$wisteria-blue: #789ae2;
$wisteria-blue-rgb: 120, 154, 226;
$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);
}