#789ADF

CSS

:root {
  --wisteria-blue: #789adf;
  --wisteria-blue-rgb: 120 154 223;
  --wisteria-blue-oklch: oklch(0.689 0.109 263.7);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(220 62% 67%);
  border-color: oklch(0.689 0.109 263.7);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #789adf;
  --color-wisteria-blue-50: #e6f5ff;
  --color-wisteria-blue-100: #d7e8ff;
  --color-wisteria-blue-200: #bed4ff;
  --color-wisteria-blue-300: #9db7f0;
  --color-wisteria-blue-400: #7d9edf;
  --color-wisteria-blue-500: #6084ce;
  --color-wisteria-blue-600: #5270ae;
  --color-wisteria-blue-700: #415a8c;
  --color-wisteria-blue-800: #2d4268;
  --color-wisteria-blue-900: #1e2d49;
  --color-wisteria-blue-950: #0e1a30;
}

SCSS

$wisteria-blue: #789adf;
$wisteria-blue-rgb: 120, 154, 223;
$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);
}