#2A748E

CSS

:root {
  --blue-fjord: #2a748e;
  --blue-fjord-rgb: 42 116 142;
  --blue-fjord-oklch: oklch(0.525 0.082 225.1);
}

.element {
  color: var(--blue-fjord);
  background-color: hsl(196 54% 36%);
  border-color: oklch(0.525 0.082 225.1);
}

Tailwind CSS v4

@theme {
  --color-blue-fjord: #2a748e;
  --color-blue-fjord-50: #defbff;
  --color-blue-fjord-100: #cceefe;
  --color-blue-fjord-200: #b0dcf0;
  --color-blue-fjord-300: #8ac0d8;
  --color-blue-fjord-400: #66a9c3;
  --color-blue-fjord-500: #4091af;
  --color-blue-fjord-600: #377b94;
  --color-blue-fjord-700: #2c6377;
  --color-blue-fjord-800: #1d4957;
  --color-blue-fjord-900: #13323d;
  --color-blue-fjord-950: #051e26;
}

SCSS

$blue-fjord: #2a748e;
$blue-fjord-rgb: 42, 116, 142;
$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);
}