#749AE4

CSS

:root {
  --wisteria-blue: #749ae4;
  --wisteria-blue-rgb: 116 154 228;
  --wisteria-blue-oklch: oklch(0.689 0.118 262.9);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(220 67% 67%);
  border-color: oklch(0.689 0.118 262.9);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #749ae4;
  --color-wisteria-blue-50: #e5f5ff;
  --color-wisteria-blue-100: #d5e8ff;
  --color-wisteria-blue-200: #bcd4ff;
  --color-wisteria-blue-300: #9ab7f4;
  --color-wisteria-blue-400: #799ee4;
  --color-wisteria-blue-500: #5c84d4;
  --color-wisteria-blue-600: #4e70b3;
  --color-wisteria-blue-700: #3e598f;
  --color-wisteria-blue-800: #2a426b;
  --color-wisteria-blue-900: #1c2d4b;
  --color-wisteria-blue-950: #0d1a32;
}

SCSS

$wisteria-blue: #749ae4;
$wisteria-blue-rgb: 116, 154, 228;
$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);
}