#237590

CSS

:root {
  --blue-fjord: #237590;
  --blue-fjord-rgb: 35 117 144;
  --blue-fjord-oklch: oklch(0.526 0.087 224.5);
}

.element {
  color: var(--blue-fjord);
  background-color: hsl(195 61% 35%);
  border-color: oklch(0.526 0.087 224.5);
}

Tailwind CSS v4

@theme {
  --color-blue-fjord: #237590;
  --color-blue-fjord-50: #dcfbff;
  --color-blue-fjord-100: #cbefff;
  --color-blue-fjord-200: #aeddf1;
  --color-blue-fjord-300: #87c1da;
  --color-blue-fjord-400: #62aac5;
  --color-blue-fjord-500: #3992b1;
  --color-blue-fjord-600: #327c95;
  --color-blue-fjord-700: #286378;
  --color-blue-fjord-800: #1a4958;
  --color-blue-fjord-900: #11333d;
  --color-blue-fjord-950: #031e27;
}

SCSS

$blue-fjord: #237590;
$blue-fjord-rgb: 35, 117, 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);
}