#749BDE

CSS

:root {
  --wisteria-blue: #749bde;
  --wisteria-blue-rgb: 116 155 222;
  --wisteria-blue-oklch: oklch(0.688 0.108 260.8);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(218 62% 66%);
  border-color: oklch(0.688 0.108 260.8);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #749bde;
  --color-wisteria-blue-50: #e5f6ff;
  --color-wisteria-blue-100: #d5e9ff;
  --color-wisteria-blue-200: #bcd5ff;
  --color-wisteria-blue-300: #9ab8f0;
  --color-wisteria-blue-400: #7a9fdf;
  --color-wisteria-blue-500: #5c85ce;
  --color-wisteria-blue-600: #4e71ae;
  --color-wisteria-blue-700: #3e5a8b;
  --color-wisteria-blue-800: #2b4368;
  --color-wisteria-blue-900: #1d2e49;
  --color-wisteria-blue-950: #0d1a30;
}

SCSS

$wisteria-blue: #749bde;
$wisteria-blue-rgb: 116, 155, 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);
}