#3057C0

CSS

:root {
  --blasphemous-blue: #3057c0;
  --blasphemous-blue-rgb: 48 87 192;
  --blasphemous-blue-oklch: oklch(0.491 0.171 265.2);
}

.element {
  color: var(--blasphemous-blue);
  background-color: hsl(224 60% 47%);
  border-color: oklch(0.491 0.171 265.2);
}

Tailwind CSS v4

@theme {
  --color-blasphemous-blue: #3057c0;
  --color-blasphemous-blue-50: #dff5ff;
  --color-blasphemous-blue-100: #cee7ff;
  --color-blasphemous-blue-200: #b4d2ff;
  --color-blasphemous-blue-300: #90b4ff;
  --color-blasphemous-blue-400: #6d99ff;
  --color-blasphemous-blue-500: #4e7df6;
  --color-blasphemous-blue-600: #426acf;
  --color-blasphemous-blue-700: #3555a7;
  --color-blasphemous-blue-800: #213f7d;
  --color-blasphemous-blue-900: #162b58;
  --color-blasphemous-blue-950: #08183c;
}

SCSS

$blasphemous-blue: #3057c0;
$blasphemous-blue-rgb: 48, 87, 192;
$blasphemous-blue-light: mix(#fff, $blasphemous-blue, 20%);
$blasphemous-blue-dark: mix(#000, $blasphemous-blue, 20%);

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