#0B8671

CSS

:root {
  --shadows-of-time: #0b8671;
  --shadows-of-time-rgb: 11 134 113;
  --shadows-of-time-oklch: oklch(0.555 0.101 176.2);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(170 85% 28%);
  border-color: oklch(0.555 0.101 176.2);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #0b8671;
  --color-shadows-of-time-50: #d7fff5;
  --color-shadows-of-time-100: #c5f4e8;
  --color-shadows-of-time-200: #a5e3d4;
  --color-shadows-of-time-300: #7bc9b8;
  --color-shadows-of-time-400: #53b29c;
  --color-shadows-of-time-500: #169c84;
  --color-shadows-of-time-600: #198470;
  --color-shadows-of-time-700: #156959;
  --color-shadows-of-time-800: #0e4e40;
  --color-shadows-of-time-900: #09362c;
  --color-shadows-of-time-950: #002119;
}

SCSS

$shadows-of-time: #0b8671;
$shadows-of-time-rgb: 11, 134, 113;
$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);
}