#018669

CSS

:root {
  --shadows-of-time: #018669;
  --shadows-of-time-rgb: 1 134 105;
  --shadows-of-time-oklch: oklch(0.552 0.108 170.6);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(167 99% 26%);
  border-color: oklch(0.552 0.108 170.6);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #018669;
  --color-shadows-of-time-50: #d7fff2;
  --color-shadows-of-time-100: #c4f4e4;
  --color-shadows-of-time-200: #a4e4cf;
  --color-shadows-of-time-300: #7acab2;
  --color-shadows-of-time-400: #51b395;
  --color-shadows-of-time-500: #109d7c;
  --color-shadows-of-time-600: #158569;
  --color-shadows-of-time-700: #126a54;
  --color-shadows-of-time-800: #0d4e3b;
  --color-shadows-of-time-900: #093629;
  --color-shadows-of-time-950: #002117;
}

SCSS

$shadows-of-time: #018669;
$shadows-of-time-rgb: 1, 134, 105;
$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);
}