#29364C

CSS

:root {
  --dark-stormy: #29364c;
  --dark-stormy-rgb: 41 54 76;
  --dark-stormy-oklch: oklch(0.331 0.043 260.7);
}

.element {
  color: var(--dark-stormy);
  background-color: hsl(218 30% 23%);
  border-color: oklch(0.331 0.043 260.7);
}

Tailwind CSS v4

@theme {
  --color-dark-stormy: #29364c;
  --color-dark-stormy-50: #eff5ff;
  --color-dark-stormy-100: #e0e8f7;
  --color-dark-stormy-200: #cbd5e7;
  --color-dark-stormy-300: #acb8ce;
  --color-dark-stormy-400: #909fb8;
  --color-dark-stormy-500: #7687a3;
  --color-dark-stormy-600: #64728a;
  --color-dark-stormy-700: #505b6f;
  --color-dark-stormy-800: #394351;
  --color-dark-stormy-900: #272e39;
  --color-dark-stormy-950: #151b23;
}

SCSS

$dark-stormy: #29364c;
$dark-stormy-rgb: 41, 54, 76;
$dark-stormy-light: mix(#fff, $dark-stormy, 20%);
$dark-stormy-dark: mix(#000, $dark-stormy, 20%);

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