#2C748C

CSS

:root {
  --blue-fjord: #2c748c;
  --blue-fjord-rgb: 44 116 140;
  --blue-fjord-oklch: oklch(0.525 0.08 223.6);
}

.element {
  color: var(--blue-fjord);
  background-color: hsl(195 52% 36%);
  border-color: oklch(0.525 0.08 223.6);
}

Tailwind CSS v4

@theme {
  --color-blue-fjord: #2c748c;
  --color-blue-fjord-50: #defbff;
  --color-blue-fjord-100: #cdeefc;
  --color-blue-fjord-200: #b1dcee;
  --color-blue-fjord-300: #8bc1d7;
  --color-blue-fjord-400: #67a9c1;
  --color-blue-fjord-500: #4292ad;
  --color-blue-fjord-600: #397b92;
  --color-blue-fjord-700: #2d6375;
  --color-blue-fjord-800: #1e4956;
  --color-blue-fjord-900: #14323c;
  --color-blue-fjord-950: #051e26;
}

SCSS

$blue-fjord: #2c748c;
$blue-fjord-rgb: 44, 116, 140;
$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);
}