#348269

CSS

:root {
  --shadows-of-time: #348269;
  --shadows-of-time-rgb: 52 130 105;
  --shadows-of-time-oklch: oklch(0.551 0.087 169);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(161 43% 36%);
  border-color: oklch(0.551 0.087 169);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #348269;
  --color-shadows-of-time-50: #defef2;
  --color-shadows-of-time-100: #ccf2e4;
  --color-shadows-of-time-200: #b0e1cf;
  --color-shadows-of-time-300: #8ac6b1;
  --color-shadows-of-time-400: #68af96;
  --color-shadows-of-time-500: #41997c;
  --color-shadows-of-time-600: #398169;
  --color-shadows-of-time-700: #2d6754;
  --color-shadows-of-time-800: #204c3c;
  --color-shadows-of-time-900: #153529;
  --color-shadows-of-time-950: #062017;
}

SCSS

$shadows-of-time: #348269;
$shadows-of-time-rgb: 52, 130, 105;
$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);
}