Sharp Blue

CSS

:root {
  --sharp-blue: #2b3d54;
  --sharp-blue-rgb: 43 61 84;
  --sharp-blue-oklch: oklch(0.355 0.047 254.9);
}

.element {
  color: var(--sharp-blue);
  background-color: hsl(214 32% 25%);
  border-color: oklch(0.355 0.047 254.9);
}

Tailwind CSS v4

@theme {
  --color-sharp-blue: #2b3d54;
  --color-sharp-blue-50: #edf6ff;
  --color-sharp-blue-100: #dee9f8;
  --color-sharp-blue-200: #c8d5e9;
  --color-sharp-blue-300: #a9b9d0;
  --color-sharp-blue-400: #8ca0ba;
  --color-sharp-blue-500: #7288a5;
  --color-sharp-blue-600: #60738b;
  --color-sharp-blue-700: #4d5c70;
  --color-sharp-blue-800: #374452;
  --color-sharp-blue-900: #262f39;
  --color-sharp-blue-950: #141b24;
}

SCSS

$sharp-blue: #2b3d54;
$sharp-blue-rgb: 43, 61, 84;
$sharp-blue-light: mix(#fff, $sharp-blue, 20%);
$sharp-blue-dark: mix(#000, $sharp-blue, 20%);

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