#7C96F2

CSS

:root {
  --wisteria-blue: #7c96f2;
  --wisteria-blue-rgb: 124 150 242;
  --wisteria-blue-oklch: oklch(0.693 0.139 270.5);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(227 82% 72%);
  border-color: oklch(0.693 0.139 270.5);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #7c96f2;
  --color-wisteria-blue-50: #e7f4ff;
  --color-wisteria-blue-100: #d8e6ff;
  --color-wisteria-blue-200: #c0d1ff;
  --color-wisteria-blue-300: #9fb3ff;
  --color-wisteria-blue-400: #8099f0;
  --color-wisteria-blue-500: #647ee1;
  --color-wisteria-blue-600: #556bbe;
  --color-wisteria-blue-700: #445599;
  --color-wisteria-blue-800: #2e3f72;
  --color-wisteria-blue-900: #1f2b50;
  --color-wisteria-blue-950: #0f1836;
}

SCSS

$wisteria-blue: #7c96f2;
$wisteria-blue-rgb: 124, 150, 242;
$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);
}