#5256F6

CSS

:root {
  --warm-blue: #5256f6;
  --warm-blue-rgb: 82 86 246;
  --warm-blue-oklch: oklch(0.552 0.233 274.6);
}

.element {
  color: var(--warm-blue);
  background-color: hsl(239 90% 64%);
  border-color: oklch(0.552 0.233 274.6);
}

Tailwind CSS v4

@theme {
  --color-warm-blue: #5256f6;
  --color-warm-blue-50: #e3f0ff;
  --color-warm-blue-100: #d3e1ff;
  --color-warm-blue-200: #bbcaff;
  --color-warm-blue-300: #9aa8ff;
  --color-warm-blue-400: #7a8aff;
  --color-warm-blue-500: #6167ff;
  --color-warm-blue-600: #5258ef;
  --color-warm-blue-700: #4147c0;
  --color-warm-blue-800: #2b3491;
  --color-warm-blue-900: #1d2467;
  --color-warm-blue-950: #0e1147;
}

SCSS

$warm-blue: #5256f6;
$warm-blue-rgb: 82, 86, 246;
$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);
}