#25856A

CSS

:root {
  --shadows-of-time: #25856a;
  --shadows-of-time-rgb: 37 133 106;
  --shadows-of-time-oklch: oklch(0.555 0.097 169.9);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(163 56% 33%);
  border-color: oklch(0.555 0.097 169.9);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #25856a;
  --color-shadows-of-time-50: #dafff2;
  --color-shadows-of-time-100: #c8f3e4;
  --color-shadows-of-time-200: #aae2cf;
  --color-shadows-of-time-300: #82c8b2;
  --color-shadows-of-time-400: #5db196;
  --color-shadows-of-time-500: #309b7c;
  --color-shadows-of-time-600: #2b8369;
  --color-shadows-of-time-700: #226954;
  --color-shadows-of-time-800: #184d3c;
  --color-shadows-of-time-900: #103629;
  --color-shadows-of-time-950: #022117;
}

SCSS

$shadows-of-time: #25856a;
$shadows-of-time-rgb: 37, 133, 106;
$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);
}