Opulent Blue

CSS

:root {
  --opulent-blue: #0055ee;
  --opulent-blue-rgb: 0 85 238;
  --opulent-blue-oklch: oklch(0.517 0.24 262);
}

.element {
  color: var(--opulent-blue);
  background-color: hsl(219 100% 47%);
  border-color: oklch(0.517 0.24 262);
}

Tailwind CSS v4

@theme {
  --color-opulent-blue: #0055ee;
  --color-opulent-blue-50: #d2f5ff;
  --color-opulent-blue-100: #bfe7ff;
  --color-opulent-blue-200: #a0d2ff;
  --color-opulent-blue-300: #77b1ff;
  --color-opulent-blue-400: #4995ff;
  --color-opulent-blue-500: #1a74ff;
  --color-opulent-blue-600: #1963f3;
  --color-opulent-blue-700: #144fc4;
  --color-opulent-blue-800: #003a93;
  --color-opulent-blue-900: #012868;
  --color-opulent-blue-950: #001548;
}

SCSS

$opulent-blue: #0055ee;
$opulent-blue-rgb: 0, 85, 238;
$opulent-blue-light: mix(#fff, $opulent-blue, 20%);
$opulent-blue-dark: mix(#000, $opulent-blue, 20%);

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