#50717A

CSS

:root {
  --winter-storm: #50717a;
  --winter-storm-rgb: 80 113 122;
  --winter-storm-oklch: oklch(0.527 0.04 216.5);
}

.element {
  color: var(--winter-storm);
  background-color: hsl(193 21% 40%);
  border-color: oklch(0.527 0.04 216.5);
}

Tailwind CSS v4

@theme {
  --color-winter-storm: #50717a;
  --color-winter-storm-50: #e9f8fd;
  --color-winter-storm-100: #daebf1;
  --color-winter-storm-200: #c2d9e0;
  --color-winter-storm-300: #a1bdc5;
  --color-winter-storm-400: #84a5ae;
  --color-winter-storm-500: #688d98;
  --color-winter-storm-600: #587880;
  --color-winter-storm-700: #466067;
  --color-winter-storm-800: #32464b;
  --color-winter-storm-900: #223134;
  --color-winter-storm-950: #111d20;
}

SCSS

$winter-storm: #50717a;
$winter-storm-rgb: 80, 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);
}