#0C866A

CSS

:root {
  --shadows-of-time: #0c866a;
  --shadows-of-time-rgb: 12 134 106;
  --shadows-of-time-oklch: oklch(0.553 0.106 170.9);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(166 84% 29%);
  border-color: oklch(0.553 0.106 170.9);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #0c866a;
  --color-shadows-of-time-50: #d7fff2;
  --color-shadows-of-time-100: #c5f4e4;
  --color-shadows-of-time-200: #a5e4d0;
  --color-shadows-of-time-300: #7bc9b2;
  --color-shadows-of-time-400: #54b396;
  --color-shadows-of-time-500: #189c7d;
  --color-shadows-of-time-600: #1a846a;
  --color-shadows-of-time-700: #166a54;
  --color-shadows-of-time-800: #104e3c;
  --color-shadows-of-time-900: #0a3629;
  --color-shadows-of-time-950: #002117;
}

SCSS

$shadows-of-time: #0c866a;
$shadows-of-time-rgb: 12, 134, 106;
$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);
}