#21856B

CSS

:root {
  --shadows-of-time: #21856b;
  --shadows-of-time-rgb: 33 133 107;
  --shadows-of-time-oklch: oklch(0.554 0.098 171.1);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(164 60% 33%);
  border-color: oklch(0.554 0.098 171.1);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #21856b;
  --color-shadows-of-time-50: #dafff2;
  --color-shadows-of-time-100: #c7f3e5;
  --color-shadows-of-time-200: #a9e3d0;
  --color-shadows-of-time-300: #81c8b3;
  --color-shadows-of-time-400: #5bb197;
  --color-shadows-of-time-500: #2c9b7d;
  --color-shadows-of-time-600: #28836a;
  --color-shadows-of-time-700: #206955;
  --color-shadows-of-time-800: #174d3c;
  --color-shadows-of-time-900: #0f362a;
  --color-shadows-of-time-950: #022117;
}

SCSS

$shadows-of-time: #21856b;
$shadows-of-time-rgb: 33, 133, 107;
$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);
}