#1A8668

CSS

:root {
  --shadows-of-time: #1a8668;
  --shadows-of-time-rgb: 26 134 104;
  --shadows-of-time-oklch: oklch(0.554 0.104 168.8);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(163 68% 31%);
  border-color: oklch(0.554 0.104 168.8);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #1a8668;
  --color-shadows-of-time-50: #d9fff1;
  --color-shadows-of-time-100: #c6f4e3;
  --color-shadows-of-time-200: #a7e3ce;
  --color-shadows-of-time-300: #7ec9b0;
  --color-shadows-of-time-400: #58b294;
  --color-shadows-of-time-500: #249c7a;
  --color-shadows-of-time-600: #228467;
  --color-shadows-of-time-700: #1c6a52;
  --color-shadows-of-time-800: #144e3b;
  --color-shadows-of-time-900: #0d3628;
  --color-shadows-of-time-950: #012116;
}

SCSS

$shadows-of-time: #1a8668;
$shadows-of-time-rgb: 26, 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);
}