#87A0C7

CSS

:root {
  --wisteria-blue: #87a0c7;
  --wisteria-blue-rgb: 135 160 199;
  --wisteria-blue-oklch: oklch(0.701 0.064 259.2);
}

.element {
  color: var(--wisteria-blue);
  background-color: hsl(217 36% 65%);
  border-color: oklch(0.701 0.064 259.2);
}

Tailwind CSS v4

@theme {
  --color-wisteria-blue: #87a0c7;
  --color-wisteria-blue-50: #ebf6ff;
  --color-wisteria-blue-100: #dce9fe;
  --color-wisteria-blue-200: #c5d5f0;
  --color-wisteria-blue-300: #a5b8d9;
  --color-wisteria-blue-400: #88a0c5;
  --color-wisteria-blue-500: #6d87b1;
  --color-wisteria-blue-600: #5c7395;
  --color-wisteria-blue-700: #4a5c78;
  --color-wisteria-blue-800: #344359;
  --color-wisteria-blue-900: #242e3e;
  --color-wisteria-blue-950: #121b27;
}

SCSS

$wisteria-blue: #87a0c7;
$wisteria-blue-rgb: 135, 160, 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);
}