#178467

CSS

:root {
  --shadows-of-time: #178467;
  --shadows-of-time-rgb: 23 132 103;
  --shadows-of-time-oklch: oklch(0.548 0.103 169.4);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(164 70% 30%);
  border-color: oklch(0.548 0.103 169.4);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #178467;
  --color-shadows-of-time-50: #d9fff1;
  --color-shadows-of-time-100: #c6f4e3;
  --color-shadows-of-time-200: #a8e3cf;
  --color-shadows-of-time-300: #7fc9b1;
  --color-shadows-of-time-400: #58b294;
  --color-shadows-of-time-500: #259c7b;
  --color-shadows-of-time-600: #238468;
  --color-shadows-of-time-700: #1c6a53;
  --color-shadows-of-time-800: #144e3b;
  --color-shadows-of-time-900: #0d3628;
  --color-shadows-of-time-950: #012116;
}

SCSS

$shadows-of-time: #178467;
$shadows-of-time-rgb: 23, 132, 103;
$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);
}