#235CB9

CSS

:root {
  --blasphemous-blue: #235cb9;
  --blasphemous-blue-rgb: 35 92 185;
  --blasphemous-blue-oklch: oklch(0.492 0.159 259.9);
}

.element {
  color: var(--blasphemous-blue);
  background-color: hsl(217 68% 43%);
  border-color: oklch(0.492 0.159 259.9);
}

Tailwind CSS v4

@theme {
  --color-blasphemous-blue: #235cb9;
  --color-blasphemous-blue-50: #ddf6ff;
  --color-blasphemous-blue-100: #cbe9ff;
  --color-blasphemous-blue-200: #afd5ff;
  --color-blasphemous-blue-300: #8ab7ff;
  --color-blasphemous-blue-400: #649dfb;
  --color-blasphemous-blue-500: #4182ed;
  --color-blasphemous-blue-600: #386fc8;
  --color-blasphemous-blue-700: #2d58a1;
  --color-blasphemous-blue-800: #1b4178;
  --color-blasphemous-blue-900: #122d55;
  --color-blasphemous-blue-950: #041939;
}

SCSS

$blasphemous-blue: #235cb9;
$blasphemous-blue-rgb: 35, 92, 185;
$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);
}