#0D7593

CSS

:root {
  --blue-fjord: #0d7593;
  --blue-fjord-rgb: 13 117 147;
  --blue-fjord-oklch: oklch(0.524 0.096 224.5);
}

.element {
  color: var(--blue-fjord);
  background-color: hsl(193 84% 31%);
  border-color: oklch(0.524 0.096 224.5);
}

Tailwind CSS v4

@theme {
  --color-blue-fjord: #0d7593;
  --color-blue-fjord-50: #d9fcff;
  --color-blue-fjord-100: #c7efff;
  --color-blue-fjord-200: #a9ddf4;
  --color-blue-fjord-300: #81c2dd;
  --color-blue-fjord-400: #59abc9;
  --color-blue-fjord-500: #2893b5;
  --color-blue-fjord-600: #257c99;
  --color-blue-fjord-700: #1e647b;
  --color-blue-fjord-800: #12495a;
  --color-blue-fjord-900: #0b333f;
  --color-blue-fjord-950: #001e28;
}

SCSS

$blue-fjord: #0d7593;
$blue-fjord-rgb: 13, 117, 147;
$blue-fjord-light: mix(#fff, $blue-fjord, 20%);
$blue-fjord-dark: mix(#000, $blue-fjord, 20%);

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