Blue Metal

CSS

:root {
  --blue-metal: #5a6370;
  --blue-metal-rgb: 90 99 112;
  --blue-metal-oklch: oklch(0.497 0.024 257.5);
}

.element {
  color: var(--blue-metal);
  background-color: hsl(215 11% 40%);
  border-color: oklch(0.497 0.024 257.5);
}

Tailwind CSS v4

@theme {
  --color-blue-metal: #5a6370;
  --color-blue-metal-50: #f1f5fc;
  --color-blue-metal-100: #e3e8f0;
  --color-blue-metal-200: #ced5df;
  --color-blue-metal-300: #b0b8c4;
  --color-blue-metal-400: #969fad;
  --color-blue-metal-500: #7d8796;
  --color-blue-metal-600: #69727f;
  --color-blue-metal-700: #545b66;
  --color-blue-metal-800: #3d434b;
  --color-blue-metal-900: #2a2e34;
  --color-blue-metal-950: #181b1f;
}

SCSS

$blue-metal: #5a6370;
$blue-metal-rgb: 90, 99, 112;
$blue-metal-light: mix(#fff, $blue-metal, 20%);
$blue-metal-dark: mix(#000, $blue-metal, 20%);

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