#0F7090

CSS

:root {
  --blue-fjord: #0f7090;
  --blue-fjord-rgb: 15 112 144;
  --blue-fjord-oklch: oklch(0.51 0.095 227.3);
}

.element {
  color: var(--blue-fjord);
  background-color: hsl(195 81% 31%);
  border-color: oklch(0.51 0.095 227.3);
}

Tailwind CSS v4

@theme {
  --color-blue-fjord: #0f7090;
  --color-blue-fjord-50: #dafbff;
  --color-blue-fjord-100: #c8efff;
  --color-blue-fjord-200: #abddf5;
  --color-blue-fjord-300: #83c1de;
  --color-blue-fjord-400: #5caaca;
  --color-blue-fjord-500: #2f92b7;
  --color-blue-fjord-600: #2a7c9a;
  --color-blue-fjord-700: #22637c;
  --color-blue-fjord-800: #15495b;
  --color-blue-fjord-900: #0d3340;
  --color-blue-fjord-950: #011e29;
}

SCSS

$blue-fjord: #0f7090;
$blue-fjord-rgb: 15, 112, 144;
$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);
}