#2C846E

CSS

:root {
  --shadows-of-time: #2c846e;
  --shadows-of-time-rgb: 44 132 110;
  --shadows-of-time-oklch: oklch(0.555 0.09 173.1);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(165 50% 35%);
  border-color: oklch(0.555 0.09 173.1);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #2c846e;
  --color-shadows-of-time-50: #dcfef4;
  --color-shadows-of-time-100: #caf2e6;
  --color-shadows-of-time-200: #ace1d2;
  --color-shadows-of-time-300: #85c7b5;
  --color-shadows-of-time-400: #61b099;
  --color-shadows-of-time-500: #379981;
  --color-shadows-of-time-600: #30826d;
  --color-shadows-of-time-700: #276857;
  --color-shadows-of-time-800: #1b4c3e;
  --color-shadows-of-time-900: #12352b;
  --color-shadows-of-time-950: #042018;
}

SCSS

$shadows-of-time: #2c846e;
$shadows-of-time-rgb: 44, 132, 110;
$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);
}