Blue Plate

CSS

:root {
  --blue-plate: #5b7a9c;
  --blue-plate-rgb: 91 122 156;
  --blue-plate-oklch: oklch(0.569 0.064 251.3);
}

.element {
  color: var(--blue-plate);
  background-color: hsl(211 26% 48%);
  border-color: oklch(0.569 0.064 251.3);
}

Tailwind CSS v4

@theme {
  --color-blue-plate: #5b7a9c;
  --color-blue-plate-50: #e9f7ff;
  --color-blue-plate-100: #d9eafd;
  --color-blue-plate-200: #c2d6f0;
  --color-blue-plate-300: #a1bad8;
  --color-blue-plate-400: #83a2c4;
  --color-blue-plate-500: #6689b0;
  --color-blue-plate-600: #577494;
  --color-blue-plate-700: #455d77;
  --color-blue-plate-800: #314458;
  --color-blue-plate-900: #212f3d;
  --color-blue-plate-950: #111c27;
}

SCSS

$blue-plate: #5b7a9c;
$blue-plate-rgb: 91, 122, 156;
$blue-plate-light: mix(#fff, $blue-plate, 20%);
$blue-plate-dark: mix(#000, $blue-plate, 20%);

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