#258563

CSS

:root {
  --shadows-of-time: #258563;
  --shadows-of-time-rgb: 37 133 99;
  --shadows-of-time-oklch: oklch(0.553 0.103 164.9);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(159 56% 33%);
  border-color: oklch(0.553 0.103 164.9);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #258563;
  --color-shadows-of-time-50: #daffef;
  --color-shadows-of-time-100: #c8f4e1;
  --color-shadows-of-time-200: #aae3cb;
  --color-shadows-of-time-300: #82c9ac;
  --color-shadows-of-time-400: #5eb28f;
  --color-shadows-of-time-500: #309b75;
  --color-shadows-of-time-600: #2b8363;
  --color-shadows-of-time-700: #23694f;
  --color-shadows-of-time-800: #194d38;
  --color-shadows-of-time-900: #103626;
  --color-shadows-of-time-950: #032115;
}

SCSS

$shadows-of-time: #258563;
$shadows-of-time-rgb: 37, 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);
}