#6652D0

CSS

:root {
  --warm-blue: #6652d0;
  --warm-blue-rgb: 102 82 208;
  --warm-blue-oklch: oklch(0.529 0.186 285.4);
}

.element {
  color: var(--warm-blue);
  background-color: hsl(250 57% 57%);
  border-color: oklch(0.529 0.186 285.4);
}

Tailwind CSS v4

@theme {
  --color-warm-blue: #6652d0;
  --color-warm-blue-50: #f1eeff;
  --color-warm-blue-100: #e3dfff;
  --color-warm-blue-200: #cfc8ff;
  --color-warm-blue-300: #b2a7ff;
  --color-warm-blue-400: #968aff;
  --color-warm-blue-500: #7f6af9;
  --color-warm-blue-600: #6b5bd2;
  --color-warm-blue-700: #5649a9;
  --color-warm-blue-800: #3c357f;
  --color-warm-blue-900: #29245a;
  --color-warm-blue-950: #17123d;
}

SCSS

$warm-blue: #6652d0;
$warm-blue-rgb: 102, 82, 208;
$warm-blue-light: mix(#fff, $warm-blue, 20%);
$warm-blue-dark: mix(#000, $warm-blue, 20%);

.element {
  color: $warm-blue;
  box-shadow: 0 0 0 2px rgba($warm-blue, 0.35);
}