#2D748D

CSS

:root {
  --blue-fjord: #2d748d;
  --blue-fjord-rgb: 45 116 141;
  --blue-fjord-oklch: oklch(0.525 0.08 224.8);
}

.element {
  color: var(--blue-fjord);
  background-color: hsl(196 52% 36%);
  border-color: oklch(0.525 0.08 224.8);
}

Tailwind CSS v4

@theme {
  --color-blue-fjord: #2d748d;
  --color-blue-fjord-50: #defaff;
  --color-blue-fjord-100: #cdeefd;
  --color-blue-fjord-200: #b1dcef;
  --color-blue-fjord-300: #8cc0d7;
  --color-blue-fjord-400: #68a9c2;
  --color-blue-fjord-500: #4391ae;
  --color-blue-fjord-600: #3a7b93;
  --color-blue-fjord-700: #2e6276;
  --color-blue-fjord-800: #1f4856;
  --color-blue-fjord-900: #14323c;
  --color-blue-fjord-950: #061e26;
}

SCSS

$blue-fjord: #2d748d;
$blue-fjord-rgb: 45, 116, 141;
$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);
}