#238569

CSS

:root {
  --shadows-of-time: #238569;
  --shadows-of-time-rgb: 35 133 105;
  --shadows-of-time-oklch: oklch(0.554 0.099 169.4);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(163 58% 33%);
  border-color: oklch(0.554 0.099 169.4);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #238569;
  --color-shadows-of-time-50: #dafff1;
  --color-shadows-of-time-100: #c8f3e4;
  --color-shadows-of-time-200: #aae3cf;
  --color-shadows-of-time-300: #81c8b1;
  --color-shadows-of-time-400: #5cb195;
  --color-shadows-of-time-500: #2e9b7b;
  --color-shadows-of-time-600: #2a8368;
  --color-shadows-of-time-700: #216953;
  --color-shadows-of-time-800: #184d3b;
  --color-shadows-of-time-900: #0f3629;
  --color-shadows-of-time-950: #022117;
}

SCSS

$shadows-of-time: #238569;
$shadows-of-time-rgb: 35, 133, 105;
$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);
}