#0076B2

CSS

:root {
  --brilliant-blue: #0076b2;
  --brilliant-blue-rgb: 0 118 178;
  --brilliant-blue-oklch: oklch(0.542 0.128 241.6);
}

.element {
  color: var(--brilliant-blue);
  background-color: hsl(200 100% 35%);
  border-color: oklch(0.542 0.128 241.6);
}

Tailwind CSS v4

@theme {
  --color-brilliant-blue: #0076b2;
  --color-brilliant-blue-50: #d7faff;
  --color-brilliant-blue-100: #c4eeff;
  --color-brilliant-blue-200: #a5dbff;
  --color-brilliant-blue-300: #7cbff4;
  --color-brilliant-blue-400: #50a7e3;
  --color-brilliant-blue-500: #168ed2;
  --color-brilliant-blue-600: #1878b1;
  --color-brilliant-blue-700: #14608f;
  --color-brilliant-blue-800: #06476a;
  --color-brilliant-blue-900: #05314a;
  --color-brilliant-blue-950: #001d31;
}

SCSS

$brilliant-blue: #0076b2;
$brilliant-blue-rgb: 0, 118, 178;
$brilliant-blue-light: mix(#fff, $brilliant-blue, 20%);
$brilliant-blue-dark: mix(#000, $brilliant-blue, 20%);

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