#52717A

CSS

:root {
  --winter-storm: #52717a;
  --winter-storm-rgb: 82 113 122;
  --winter-storm-oklch: oklch(0.528 0.038 217.6);
}

.element {
  color: var(--winter-storm);
  background-color: hsl(194 20% 40%);
  border-color: oklch(0.528 0.038 217.6);
}

Tailwind CSS v4

@theme {
  --color-winter-storm: #52717a;
  --color-winter-storm-50: #eaf8fd;
  --color-winter-storm-100: #dbebf1;
  --color-winter-storm-200: #c3d9e0;
  --color-winter-storm-300: #a3bcc5;
  --color-winter-storm-400: #86a4ae;
  --color-winter-storm-500: #6a8d97;
  --color-winter-storm-600: #5a7780;
  --color-winter-storm-700: #475f66;
  --color-winter-storm-800: #33464b;
  --color-winter-storm-900: #233034;
  --color-winter-storm-950: #121d1f;
}

SCSS

$winter-storm: #52717a;
$winter-storm-rgb: 82, 113, 122;
$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);
}