Aircraft Blue

CSS

:root {
  --aircraft-blue: #354f58;
  --aircraft-blue-rgb: 53 79 88;
  --aircraft-blue-oklch: oklch(0.41 0.035 221.5);
}

.element {
  color: var(--aircraft-blue);
  background-color: hsl(195 25% 28%);
  border-color: oklch(0.41 0.035 221.5);
}

Tailwind CSS v4

@theme {
  --color-aircraft-blue: #354f58;
  --color-aircraft-blue-50: #ebf8fd;
  --color-aircraft-blue-100: #dcebf1;
  --color-aircraft-blue-200: #c5d8df;
  --color-aircraft-blue-300: #a5bcc5;
  --color-aircraft-blue-400: #89a4ad;
  --color-aircraft-blue-500: #6d8c97;
  --color-aircraft-blue-600: #5d767f;
  --color-aircraft-blue-700: #4a5f66;
  --color-aircraft-blue-800: #35454b;
  --color-aircraft-blue-900: #243034;
  --color-aircraft-blue-950: #131c1f;
}

SCSS

$aircraft-blue: #354f58;
$aircraft-blue-rgb: 53, 79, 88;
$aircraft-blue-light: mix(#fff, $aircraft-blue, 20%);
$aircraft-blue-dark: mix(#000, $aircraft-blue, 20%);

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