#577075

CSS

:root {
  --winter-storm: #577075;
  --winter-storm-rgb: 87 112 117;
  --winter-storm-oklch: oklch(0.527 0.03 211.2);
}

.element {
  color: var(--winter-storm);
  background-color: hsl(190 15% 40%);
  border-color: oklch(0.527 0.03 211.2);
}

Tailwind CSS v4

@theme {
  --color-winter-storm: #577075;
  --color-winter-storm-50: #ecf8fa;
  --color-winter-storm-100: #ddebee;
  --color-winter-storm-200: #c6d8dc;
  --color-winter-storm-300: #a7bcc1;
  --color-winter-storm-400: #8ba4a9;
  --color-winter-storm-500: #6f8c92;
  --color-winter-storm-600: #5f767b;
  --color-winter-storm-700: #4b5f63;
  --color-winter-storm-800: #364548;
  --color-winter-storm-900: #253032;
  --color-winter-storm-950: #141c1e;
}

SCSS

$winter-storm: #577075;
$winter-storm-rgb: 87, 112, 117;
$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);
}