#3D8166

CSS

:root {
  --shadows-of-time: #3d8166;
  --shadows-of-time-rgb: 61 129 102;
  --shadows-of-time-oklch: oklch(0.551 0.082 165.2);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(156 36% 37%);
  border-color: oklch(0.551 0.082 165.2);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #3d8166;
  --color-shadows-of-time-50: #e0fdf0;
  --color-shadows-of-time-100: #cff1e2;
  --color-shadows-of-time-200: #b4e0cd;
  --color-shadows-of-time-300: #8fc5af;
  --color-shadows-of-time-400: #6eae93;
  --color-shadows-of-time-500: #4b9779;
  --color-shadows-of-time-600: #418066;
  --color-shadows-of-time-700: #336752;
  --color-shadows-of-time-800: #254b3a;
  --color-shadows-of-time-900: #193428;
  --color-shadows-of-time-950: #092016;
}

SCSS

$shadows-of-time: #3d8166;
$shadows-of-time-rgb: 61, 129, 102;
$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);
}