#26836A

CSS

:root {
  --shadows-of-time: #26836a;
  --shadows-of-time-rgb: 38 131 106;
  --shadows-of-time-oklch: oklch(0.549 0.094 171);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(164 55% 33%);
  border-color: oklch(0.549 0.094 171);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #26836a;
  --color-shadows-of-time-50: #dbfff2;
  --color-shadows-of-time-100: #c9f3e5;
  --color-shadows-of-time-200: #abe2d0;
  --color-shadows-of-time-300: #83c8b3;
  --color-shadows-of-time-400: #5fb197;
  --color-shadows-of-time-500: #339a7e;
  --color-shadows-of-time-600: #2d826b;
  --color-shadows-of-time-700: #246855;
  --color-shadows-of-time-800: #1a4d3d;
  --color-shadows-of-time-900: #11352a;
  --color-shadows-of-time-950: #032017;
}

SCSS

$shadows-of-time: #26836a;
$shadows-of-time-rgb: 38, 131, 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);
}