#238367

CSS

:root {
  --shadows-of-time: #238367;
  --shadows-of-time-rgb: 35 131 103;
  --shadows-of-time-oklch: oklch(0.548 0.098 169);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(163 58% 33%);
  border-color: oklch(0.548 0.098 169);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #238367;
  --color-shadows-of-time-50: #dafff1;
  --color-shadows-of-time-100: #c8f3e3;
  --color-shadows-of-time-200: #aae2cf;
  --color-shadows-of-time-300: #82c8b1;
  --color-shadows-of-time-400: #5eb194;
  --color-shadows-of-time-500: #309b7b;
  --color-shadows-of-time-600: #2b8368;
  --color-shadows-of-time-700: #236953;
  --color-shadows-of-time-800: #194d3b;
  --color-shadows-of-time-900: #103629;
  --color-shadows-of-time-950: #032116;
}

SCSS

$shadows-of-time: #238367;
$shadows-of-time-rgb: 35, 131, 103;
$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);
}