#3270A8

CSS

:root {
  --muted-blue: #3270a8;
  --muted-blue-rgb: 50 112 168;
  --muted-blue-oklch: oklch(0.531 0.109 248.6);
}

.element {
  color: var(--muted-blue);
  background-color: hsl(208 54% 43%);
  border-color: oklch(0.531 0.109 248.6);
}

Tailwind CSS v4

@theme {
  --color-muted-blue: #3270a8;
  --color-muted-blue-50: #dff8ff;
  --color-muted-blue-100: #cdebff;
  --color-muted-blue-200: #b2d8ff;
  --color-muted-blue-300: #8dbcee;
  --color-muted-blue-400: #69a4dc;
  --color-muted-blue-500: #458bcb;
  --color-muted-blue-600: #3c76ab;
  --color-muted-blue-700: #2f5e89;
  --color-muted-blue-800: #1f4566;
  --color-muted-blue-900: #143048;
  --color-muted-blue-950: #061c2f;
}

SCSS

$muted-blue: #3270a8;
$muted-blue-rgb: 50, 112, 168;
$muted-blue-light: mix(#fff, $muted-blue, 20%);
$muted-blue-dark: mix(#000, $muted-blue, 20%);

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