#7F9CC7

CSS

:root {
  --wisteria-blue: #7f9cc7;
  --wisteria-blue-rgb: 127 156 199;
  --wisteria-blue-oklch: oklch(0.687 0.072 258.1);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(216 39% 64%);
  border-color: oklch(0.687 0.072 258.1);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #7f9cc7;
  --color-wisteria-blue-50: #e9f6ff;
  --color-wisteria-blue-100: #dae9ff;
  --color-wisteria-blue-200: #c3d5f4;
  --color-wisteria-blue-300: #a2b9dd;
  --color-wisteria-blue-400: #84a0c9;
  --color-wisteria-blue-500: #6888b6;
  --color-wisteria-blue-600: #597399;
  --color-wisteria-blue-700: #475c7b;
  --color-wisteria-blue-800: #32435b;
  --color-wisteria-blue-900: #222f40;
  --color-wisteria-blue-950: #111b29;
}

SCSS

$wisteria-blue: #7f9cc7;
$wisteria-blue-rgb: 127, 156, 199;
$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);
}