#31826A

CSS

:root {
  --shadows-of-time: #31826a;
  --shadows-of-time-rgb: 49 130 106;
  --shadows-of-time-oklch: oklch(0.55 0.088 170.3);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(162 45% 35%);
  border-color: oklch(0.55 0.088 170.3);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #31826a;
  --color-shadows-of-time-50: #ddfef2;
  --color-shadows-of-time-100: #cbf2e5;
  --color-shadows-of-time-200: #afe1d0;
  --color-shadows-of-time-300: #88c6b2;
  --color-shadows-of-time-400: #66af97;
  --color-shadows-of-time-500: #3e997e;
  --color-shadows-of-time-600: #36816a;
  --color-shadows-of-time-700: #2b6855;
  --color-shadows-of-time-800: #1f4c3d;
  --color-shadows-of-time-900: #14352a;
  --color-shadows-of-time-950: #052017;
}

SCSS

$shadows-of-time: #31826a;
$shadows-of-time-rgb: 49, 130, 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);
}