#1C8461

CSS

:root {
  --shadows-of-time: #1c8461;
  --shadows-of-time-rgb: 28 132 97;
  --shadows-of-time-oklch: oklch(0.547 0.107 165);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(160 65% 31%);
  border-color: oklch(0.547 0.107 165);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #1c8461;
  --color-shadows-of-time-50: #d9ffef;
  --color-shadows-of-time-100: #c7f4e0;
  --color-shadows-of-time-200: #a9e3cb;
  --color-shadows-of-time-300: #80c9ac;
  --color-shadows-of-time-400: #5ab28f;
  --color-shadows-of-time-500: #2a9c74;
  --color-shadows-of-time-600: #268463;
  --color-shadows-of-time-700: #1f6a4f;
  --color-shadows-of-time-800: #164e38;
  --color-shadows-of-time-900: #0f3626;
  --color-shadows-of-time-950: #022114;
}

SCSS

$shadows-of-time: #1c8461;
$shadows-of-time-rgb: 28, 132, 97;
$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);
}