#0079B8

CSS

:root {
  --brilliant-blue: #0079b8;
  --brilliant-blue-rgb: 0 121 184;
  --brilliant-blue-oklch: oklch(0.552 0.132 242.3);
}

.element {
  color: var(--brilliant-blue);
  background-color: hsl(201 100% 36%);
  border-color: oklch(0.552 0.132 242.3);
}

Tailwind CSS v4

@theme {
  --color-brilliant-blue: #0079b8;
  --color-brilliant-blue-50: #d6faff;
  --color-brilliant-blue-100: #c3eeff;
  --color-brilliant-blue-200: #a4dbff;
  --color-brilliant-blue-300: #7bbff6;
  --color-brilliant-blue-400: #4ea7e5;
  --color-brilliant-blue-500: #0d8ed5;
  --color-brilliant-blue-600: #1378b4;
  --color-brilliant-blue-700: #106090;
  --color-brilliant-blue-800: #03476b;
  --color-brilliant-blue-900: #04314b;
  --color-brilliant-blue-950: #001d32;
}

SCSS

$brilliant-blue: #0079b8;
$brilliant-blue-rgb: 0, 121, 184;
$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);
}