#4F7180

CSS

:root {
  --winter-storm: #4f7180;
  --winter-storm-rgb: 79 113 128;
  --winter-storm-oklch: oklch(0.528 0.045 227.2);
}

.element {
  color: var(--winter-storm);
  background-color: hsl(198 24% 41%);
  border-color: oklch(0.528 0.045 227.2);
}

Tailwind CSS v4

@theme {
  --color-winter-storm: #4f7180;
  --color-winter-storm-50: #e9f8ff;
  --color-winter-storm-100: #d9ebf4;
  --color-winter-storm-200: #c1d8e4;
  --color-winter-storm-300: #a0bcca;
  --color-winter-storm-400: #83a4b4;
  --color-winter-storm-500: #668d9e;
  --color-winter-storm-600: #577785;
  --color-winter-storm-700: #455f6b;
  --color-winter-storm-800: #31464e;
  --color-winter-storm-900: #213036;
  --color-winter-storm-950: #111d21;
}

SCSS

$winter-storm: #4f7180;
$winter-storm-rgb: 79, 113, 128;
$winter-storm-light: mix(#fff, $winter-storm, 20%);
$winter-storm-dark: mix(#000, $winter-storm, 20%);

.element {
  color: $winter-storm;
  box-shadow: 0 0 0 2px rgba($winter-storm, 0.35);
}