#358261

CSS

:root {
  --shadows-of-time: #358261;
  --shadows-of-time-rgb: 53 130 97;
  --shadows-of-time-oklch: oklch(0.549 0.093 162.5);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(154 42% 36%);
  border-color: oklch(0.549 0.093 162.5);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #358261;
  --color-shadows-of-time-50: #defeee;
  --color-shadows-of-time-100: #ccf2e0;
  --color-shadows-of-time-200: #b0e1ca;
  --color-shadows-of-time-300: #8ac7ab;
  --color-shadows-of-time-400: #69b08e;
  --color-shadows-of-time-500: #439974;
  --color-shadows-of-time-600: #3a8262;
  --color-shadows-of-time-700: #2e684e;
  --color-shadows-of-time-800: #214c37;
  --color-shadows-of-time-900: #163526;
  --color-shadows-of-time-950: #072014;
}

SCSS

$shadows-of-time: #358261;
$shadows-of-time-rgb: 53, 130, 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);
}