#4F7279

CSS

:root {
  --winter-storm: #4f7279;
  --winter-storm-rgb: 79 114 121;
  --winter-storm-oklch: oklch(0.528 0.041 211.4);
}

.element {
  color: var(--winter-storm);
  background-color: hsl(190 21% 39%);
  border-color: oklch(0.528 0.041 211.4);
}

Tailwind CSS v4

@theme {
  --color-winter-storm: #4f7279;
  --color-winter-storm-50: #e9f9fc;
  --color-winter-storm-100: #d9ecf0;
  --color-winter-storm-200: #c1d9df;
  --color-winter-storm-300: #a0bdc4;
  --color-winter-storm-400: #83a5ac;
  --color-winter-storm-500: #668e96;
  --color-winter-storm-600: #57787f;
  --color-winter-storm-700: #456065;
  --color-winter-storm-800: #32464a;
  --color-winter-storm-900: #223133;
  --color-winter-storm-950: #111d1f;
}

SCSS

$winter-storm: #4f7279;
$winter-storm-rgb: 79, 114, 121;
$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);
}