#265BC0

CSS

:root {
  --blasphemous-blue: #265bc0;
  --blasphemous-blue-rgb: 38 91 192;
  --blasphemous-blue-oklch: oklch(0.496 0.169 261.7);
}

.element {
  color: var(--blasphemous-blue);
  background-color: hsl(219 67% 45%);
  border-color: oklch(0.496 0.169 261.7);
}

Tailwind CSS v4

@theme {
  --color-blasphemous-blue: #265bc0;
  --color-blasphemous-blue-50: #ddf6ff;
  --color-blasphemous-blue-100: #cbe8ff;
  --color-blasphemous-blue-200: #afd4ff;
  --color-blasphemous-blue-300: #8ab6ff;
  --color-blasphemous-blue-400: #659cff;
  --color-blasphemous-blue-500: #4380f4;
  --color-blasphemous-blue-600: #396dce;
  --color-blasphemous-blue-700: #2d57a5;
  --color-blasphemous-blue-800: #1b407c;
  --color-blasphemous-blue-900: #122c57;
  --color-blasphemous-blue-950: #05193b;
}

SCSS

$blasphemous-blue: #265bc0;
$blasphemous-blue-rgb: 38, 91, 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);
}