#218569

CSS

:root {
  --shadows-of-time: #218569;
  --shadows-of-time-rgb: 33 133 105;
  --shadows-of-time-oklch: oklch(0.553 0.1 169.5);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(163 60% 33%);
  border-color: oklch(0.553 0.1 169.5);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #218569;
  --color-shadows-of-time-50: #dafff2;
  --color-shadows-of-time-100: #c7f3e4;
  --color-shadows-of-time-200: #a9e3cf;
  --color-shadows-of-time-300: #81c8b1;
  --color-shadows-of-time-400: #5bb295;
  --color-shadows-of-time-500: #2c9b7b;
  --color-shadows-of-time-600: #288369;
  --color-shadows-of-time-700: #206953;
  --color-shadows-of-time-800: #174d3b;
  --color-shadows-of-time-900: #0f3629;
  --color-shadows-of-time-950: #022117;
}

SCSS

$shadows-of-time: #218569;
$shadows-of-time-rgb: 33, 133, 105;
$shadows-of-time-light: mix(#fff, $shadows-of-time, 20%);
$shadows-of-time-dark: mix(#000, $shadows-of-time, 20%);

.element {
  color: $shadows-of-time;
  box-shadow: 0 0 0 2px rgba($shadows-of-time, 0.35);
}