#318263

CSS

:root {
  --shadows-of-time: #318263;
  --shadows-of-time-rgb: 49 130 99;
  --shadows-of-time-oklch: oklch(0.548 0.093 164.7);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(157 45% 35%);
  border-color: oklch(0.548 0.093 164.7);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #318263;
  --color-shadows-of-time-50: #ddfeef;
  --color-shadows-of-time-100: #cbf2e1;
  --color-shadows-of-time-200: #afe2cc;
  --color-shadows-of-time-300: #88c7ad;
  --color-shadows-of-time-400: #66b090;
  --color-shadows-of-time-500: #3f9a76;
  --color-shadows-of-time-600: #378264;
  --color-shadows-of-time-700: #2c6850;
  --color-shadows-of-time-800: #1f4c39;
  --color-shadows-of-time-900: #153527;
  --color-shadows-of-time-950: #062015;
}

SCSS

$shadows-of-time: #318263;
$shadows-of-time-rgb: 49, 130, 99;
$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);
}