#148668

CSS

:root {
  --shadows-of-time: #148668;
  --shadows-of-time-rgb: 20 134 104;
  --shadows-of-time-oklch: oklch(0.553 0.106 169.2);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(164 74% 30%);
  border-color: oklch(0.553 0.106 169.2);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #148668;
  --color-shadows-of-time-50: #d8fff1;
  --color-shadows-of-time-100: #c5f4e3;
  --color-shadows-of-time-200: #a6e4ce;
  --color-shadows-of-time-300: #7dc9b0;
  --color-shadows-of-time-400: #56b394;
  --color-shadows-of-time-500: #1f9c7a;
  --color-shadows-of-time-600: #1f8468;
  --color-shadows-of-time-700: #196a53;
  --color-shadows-of-time-800: #124e3b;
  --color-shadows-of-time-900: #0c3628;
  --color-shadows-of-time-950: #002116;
}

SCSS

$shadows-of-time: #148668;
$shadows-of-time-rgb: 20, 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);
}