#308363

CSS

:root {
  --shadows-of-time: #308363;
  --shadows-of-time-rgb: 48 131 99;
  --shadows-of-time-oklch: oklch(0.55 0.095 164.4);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(157 46% 35%);
  border-color: oklch(0.55 0.095 164.4);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #308363;
  --color-shadows-of-time-50: #ddfeef;
  --color-shadows-of-time-100: #cbf3e1;
  --color-shadows-of-time-200: #aee2cb;
  --color-shadows-of-time-300: #87c7ad;
  --color-shadows-of-time-400: #65b090;
  --color-shadows-of-time-500: #3d9a76;
  --color-shadows-of-time-600: #358264;
  --color-shadows-of-time-700: #2a6850;
  --color-shadows-of-time-800: #1f4d38;
  --color-shadows-of-time-900: #143527;
  --color-shadows-of-time-950: #052015;
}

SCSS

$shadows-of-time: #308363;
$shadows-of-time-rgb: 48, 131, 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);
}