Am I Blue?

CSS

:root {
  --am-i-blue: #417086;
  --am-i-blue-rgb: 65 112 134;
  --am-i-blue-oklch: oklch(0.521 0.062 229.7);
}

.element {
  color: var(--am-i-blue);
  background-color: hsl(199 35% 39%);
  border-color: oklch(0.521 0.062 229.7);
}

Tailwind CSS v4

@theme {
  --color-am-i-blue: #417086;
  --color-am-i-blue-50: #e4f9ff;
  --color-am-i-blue-100: #d4ecf9;
  --color-am-i-blue-200: #bbdaea;
  --color-am-i-blue-300: #98bed2;
  --color-am-i-blue-400: #78a6bc;
  --color-am-i-blue-500: #598ea7;
  --color-am-i-blue-600: #4c788d;
  --color-am-i-blue-700: #3c6071;
  --color-am-i-blue-800: #2a4753;
  --color-am-i-blue-900: #1d313a;
  --color-am-i-blue-950: #0c1d24;
}

SCSS

$am-i-blue: #417086;
$am-i-blue-rgb: 65, 112, 134;
$am-i-blue-light: mix(#fff, $am-i-blue, 20%);
$am-i-blue-dark: mix(#000, $am-i-blue, 20%);

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