Boeing Blue

CSS

:root {
  --boeing-blue: #3d4652;
  --boeing-blue-rgb: 61 70 82;
  --boeing-blue-oklch: oklch(0.391 0.024 255.7);
}

.element {
  color: var(--boeing-blue);
  background-color: hsl(214 15% 28%);
  border-color: oklch(0.391 0.024 255.7);
}

Tailwind CSS v4

@theme {
  --color-boeing-blue: #3d4652;
  --color-boeing-blue-50: #f1f5fc;
  --color-boeing-blue-100: #e3e8f0;
  --color-boeing-blue-200: #ced5df;
  --color-boeing-blue-300: #b0b8c4;
  --color-boeing-blue-400: #959fad;
  --color-boeing-blue-500: #7c8796;
  --color-boeing-blue-600: #69727f;
  --color-boeing-blue-700: #545b66;
  --color-boeing-blue-800: #3d434b;
  --color-boeing-blue-900: #2a2e34;
  --color-boeing-blue-950: #171b1f;
}

SCSS

$boeing-blue: #3d4652;
$boeing-blue-rgb: 61, 70, 82;
$boeing-blue-light: mix(#fff, $boeing-blue, 20%);
$boeing-blue-dark: mix(#000, $boeing-blue, 20%);

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