#4C586D

CSS

:root {
  --storm-rising: #4c586d;
  --storm-rising-rgb: 76 88 109;
  --storm-rising-oklch: oklch(0.458 0.038 261.6);
}

.element {
  color: var(--storm-rising);
  background-color: hsl(218 18% 36%);
  border-color: oklch(0.458 0.038 261.6);
}

Tailwind CSS v4

@theme {
  --color-storm-rising: #4c586d;
  --color-storm-rising-50: #f0f5ff;
  --color-storm-rising-100: #e1e8f5;
  --color-storm-rising-200: #ccd5e5;
  --color-storm-rising-300: #aeb8cb;
  --color-storm-rising-400: #929fb5;
  --color-storm-rising-500: #7887a0;
  --color-storm-rising-600: #667287;
  --color-storm-rising-700: #525b6c;
  --color-storm-rising-800: #3b4350;
  --color-storm-rising-900: #282e37;
  --color-storm-rising-950: #161b22;
}

SCSS

$storm-rising: #4c586d;
$storm-rising-rgb: 76, 88, 109;
$storm-rising-light: mix(#fff, $storm-rising, 20%);
$storm-rising-dark: mix(#000, $storm-rising, 20%);

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