#1E8668

CSS

:root {
  --shadows-of-time: #1e8668;
  --shadows-of-time-rgb: 30 134 104;
  --shadows-of-time-oklch: oklch(0.555 0.103 168.5);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(163 63% 32%);
  border-color: oklch(0.555 0.103 168.5);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #1e8668;
  --color-shadows-of-time-50: #d9fff1;
  --color-shadows-of-time-100: #c7f4e3;
  --color-shadows-of-time-200: #a8e3ce;
  --color-shadows-of-time-300: #7fc9b0;
  --color-shadows-of-time-400: #5ab293;
  --color-shadows-of-time-500: #289c7a;
  --color-shadows-of-time-600: #258467;
  --color-shadows-of-time-700: #1e6952;
  --color-shadows-of-time-800: #154e3a;
  --color-shadows-of-time-900: #0e3628;
  --color-shadows-of-time-950: #012116;
}

SCSS

$shadows-of-time: #1e8668;
$shadows-of-time-rgb: 30, 134, 104;
$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);
}