Thick Blue

CSS

:root {
  --thick-blue: #5566dd;
  --thick-blue-rgb: 85 102 221;
  --thick-blue-oklch: oklch(0.562 0.181 273);
}

.element {
  color: var(--thick-blue);
  background-color: hsl(233 67% 60%);
  border-color: oklch(0.562 0.181 273);
}

Tailwind CSS v4

@theme {
  --color-thick-blue: #5566dd;
  --color-thick-blue-50: #e5f2ff;
  --color-thick-blue-100: #d6e4ff;
  --color-thick-blue-200: #bdceff;
  --color-thick-blue-300: #9dafff;
  --color-thick-blue-400: #7d93ff;
  --color-thick-blue-500: #6275fb;
  --color-thick-blue-600: #5364d4;
  --color-thick-blue-700: #4250ab;
  --color-thick-blue-800: #2c3b80;
  --color-thick-blue-900: #1e285a;
  --color-thick-blue-950: #0e163e;
}

SCSS

$thick-blue: #5566dd;
$thick-blue-rgb: 85, 102, 221;
$thick-blue-light: mix(#fff, $thick-blue, 20%);
$thick-blue-dark: mix(#000, $thick-blue, 20%);

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