#288563

CSS

:root {
  --shadows-of-time: #288563;
  --shadows-of-time-rgb: 40 133 99;
  --shadows-of-time-oklch: oklch(0.553 0.102 164.6);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(158 54% 34%);
  border-color: oklch(0.553 0.102 164.6);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #288563;
  --color-shadows-of-time-50: #dbffef;
  --color-shadows-of-time-100: #c9f3e0;
  --color-shadows-of-time-200: #abe3cb;
  --color-shadows-of-time-300: #83c8ac;
  --color-shadows-of-time-400: #5fb28f;
  --color-shadows-of-time-500: #339b75;
  --color-shadows-of-time-600: #2e8363;
  --color-shadows-of-time-700: #24694f;
  --color-shadows-of-time-800: #1a4d38;
  --color-shadows-of-time-900: #113626;
  --color-shadows-of-time-950: #032114;
}

SCSS

$shadows-of-time: #288563;
$shadows-of-time-rgb: 40, 133, 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);
}