Coronet Blue

CSS

:root {
  --coronet-blue: #59728e;
  --coronet-blue-rgb: 89 114 142;
  --coronet-blue-oklch: oklch(0.543 0.053 251.6);
}

.element {
  color: var(--coronet-blue);
  background-color: hsl(212 23% 45%);
  border-color: oklch(0.543 0.053 251.6);
}

Tailwind CSS v4

@theme {
  --color-coronet-blue: #59728e;
  --color-coronet-blue-50: #ebf6ff;
  --color-coronet-blue-100: #dce9fa;
  --color-coronet-blue-200: #c5d6eb;
  --color-coronet-blue-300: #a5b9d3;
  --color-coronet-blue-400: #88a1bd;
  --color-coronet-blue-500: #6d89a9;
  --color-coronet-blue-600: #5c748f;
  --color-coronet-blue-700: #495d72;
  --color-coronet-blue-800: #344454;
  --color-coronet-blue-900: #242f3b;
  --color-coronet-blue-950: #121b25;
}

SCSS

$coronet-blue: #59728e;
$coronet-blue-rgb: 89, 114, 142;
$coronet-blue-light: mix(#fff, $coronet-blue, 20%);
$coronet-blue-dark: mix(#000, $coronet-blue, 20%);

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