Bronze Blue

CSS

:root {
  --bronze-blue: #3a4856;
  --bronze-blue-rgb: 58 72 86;
  --bronze-blue-oklch: oklch(0.395 0.03 248.6);
}

.element {
  color: var(--bronze-blue);
  background-color: hsl(210 19% 28%);
  border-color: oklch(0.395 0.03 248.6);
}

Tailwind CSS v4

@theme {
  --color-bronze-blue: #3a4856;
  --color-bronze-blue-50: #eff6fe;
  --color-bronze-blue-100: #e1e9f2;
  --color-bronze-blue-200: #cbd5e1;
  --color-bronze-blue-300: #acb9c7;
  --color-bronze-blue-400: #91a0b0;
  --color-bronze-blue-500: #77889a;
  --color-bronze-blue-600: #657382;
  --color-bronze-blue-700: #515c68;
  --color-bronze-blue-800: #3a444c;
  --color-bronze-blue-900: #282f35;
  --color-bronze-blue-950: #161b20;
}

SCSS

$bronze-blue: #3a4856;
$bronze-blue-rgb: 58, 72, 86;
$bronze-blue-light: mix(#fff, $bronze-blue, 20%);
$bronze-blue-dark: mix(#000, $bronze-blue, 20%);

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