#2D826D

CSS

:root {
  --shadows-of-time: #2d826d;
  --shadows-of-time-rgb: 45 130 109;
  --shadows-of-time-oklch: oklch(0.55 0.088 173.5);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(165 49% 34%);
  border-color: oklch(0.55 0.088 173.5);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #2d826d;
  --color-shadows-of-time-50: #dcfef4;
  --color-shadows-of-time-100: #cbf2e6;
  --color-shadows-of-time-200: #ade1d2;
  --color-shadows-of-time-300: #87c7b5;
  --color-shadows-of-time-400: #63b09a;
  --color-shadows-of-time-500: #3a9981;
  --color-shadows-of-time-600: #33816d;
  --color-shadows-of-time-700: #296857;
  --color-shadows-of-time-800: #1d4c3f;
  --color-shadows-of-time-900: #13352b;
  --color-shadows-of-time-950: #042018;
}

SCSS

$shadows-of-time: #2d826d;
$shadows-of-time-rgb: 45, 130, 109;
$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);
}