#1A856F

CSS

:root {
  --shadows-of-time: #1a856f;
  --shadows-of-time-rgb: 26 133 111;
  --shadows-of-time-oklch: oklch(0.554 0.098 174.7);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(168 67% 31%);
  border-color: oklch(0.554 0.098 174.7);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #1a856f;
  --color-shadows-of-time-50: #d9fff4;
  --color-shadows-of-time-100: #c6f3e7;
  --color-shadows-of-time-200: #a8e3d3;
  --color-shadows-of-time-300: #7fc8b6;
  --color-shadows-of-time-400: #58b19b;
  --color-shadows-of-time-500: #259b82;
  --color-shadows-of-time-600: #23836e;
  --color-shadows-of-time-700: #1c6958;
  --color-shadows-of-time-800: #144d3f;
  --color-shadows-of-time-900: #0d362b;
  --color-shadows-of-time-950: #012119;
}

SCSS

$shadows-of-time: #1a856f;
$shadows-of-time-rgb: 26, 133, 111;
$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);
}