#7C9ADE

CSS

:root {
  --wisteria-blue: #7c9ade;
  --wisteria-blue-rgb: 124 154 222;
  --wisteria-blue-oklch: oklch(0.691 0.106 265.5);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(222 60% 68%);
  border-color: oklch(0.691 0.106 265.5);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #7c9ade;
  --color-wisteria-blue-50: #e8f5ff;
  --color-wisteria-blue-100: #d8e8ff;
  --color-wisteria-blue-200: #c0d4ff;
  --color-wisteria-blue-300: #9fb6ef;
  --color-wisteria-blue-400: #809dde;
  --color-wisteria-blue-500: #6483cd;
  --color-wisteria-blue-600: #556fad;
  --color-wisteria-blue-700: #44598b;
  --color-wisteria-blue-800: #2f4167;
  --color-wisteria-blue-900: #202d49;
  --color-wisteria-blue-950: #0f1a2f;
}

SCSS

$wisteria-blue: #7c9ade;
$wisteria-blue-rgb: 124, 154, 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);
}