#7B9ADB

CSS

:root {
  --wisteria-blue: #7b9adb;
  --wisteria-blue-rgb: 123 154 219;
  --wisteria-blue-oklch: oklch(0.689 0.103 264.3);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(221 57% 67%);
  border-color: oklch(0.689 0.103 264.3);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #7b9adb;
  --color-wisteria-blue-50: #e8f5ff;
  --color-wisteria-blue-100: #d8e8ff;
  --color-wisteria-blue-200: #c0d4ff;
  --color-wisteria-blue-300: #9fb7ed;
  --color-wisteria-blue-400: #809edc;
  --color-wisteria-blue-500: #6484ca;
  --color-wisteria-blue-600: #5570ab;
  --color-wisteria-blue-700: #435a89;
  --color-wisteria-blue-800: #2f4266;
  --color-wisteria-blue-900: #202d48;
  --color-wisteria-blue-950: #0f1a2f;
}

SCSS

$wisteria-blue: #7b9adb;
$wisteria-blue-rgb: 123, 154, 219;
$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);
}