#7F99DD

CSS

:root {
  --wisteria-blue: #7f99dd;
  --wisteria-blue-rgb: 127 153 221;
  --wisteria-blue-oklch: oklch(0.69 0.105 267.6);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(223 58% 68%);
  border-color: oklch(0.69 0.105 267.6);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #7f99dd;
  --color-wisteria-blue-50: #e9f5ff;
  --color-wisteria-blue-100: #dae7ff;
  --color-wisteria-blue-200: #c2d3ff;
  --color-wisteria-blue-300: #a2b5ee;
  --color-wisteria-blue-400: #839cdd;
  --color-wisteria-blue-500: #6883cc;
  --color-wisteria-blue-600: #586fac;
  --color-wisteria-blue-700: #46598a;
  --color-wisteria-blue-800: #314167;
  --color-wisteria-blue-900: #212d48;
  --color-wisteria-blue-950: #111a2f;
}

SCSS

$wisteria-blue: #7f99dd;
$wisteria-blue-rgb: 127, 153, 221;
$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);
}