#749DD7

CSS

:root {
  --wisteria-blue: #749dd7;
  --wisteria-blue-rgb: 116 157 215;
  --wisteria-blue-oklch: oklch(0.689 0.097 257.1);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(215 55% 65%);
  border-color: oklch(0.689 0.097 257.1);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #749dd7;
  --color-wisteria-blue-50: #e5f6ff;
  --color-wisteria-blue-100: #d5e9ff;
  --color-wisteria-blue-200: #bcd6fe;
  --color-wisteria-blue-300: #9ab9ea;
  --color-wisteria-blue-400: #79a0d8;
  --color-wisteria-blue-500: #5b87c6;
  --color-wisteria-blue-600: #4e73a7;
  --color-wisteria-blue-700: #3e5c86;
  --color-wisteria-blue-800: #2b4463;
  --color-wisteria-blue-900: #1d2f46;
  --color-wisteria-blue-950: #0d1b2d;
}

SCSS

$wisteria-blue: #749dd7;
$wisteria-blue-rgb: 116, 157, 215;
$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);
}