#29826D

CSS

:root {
  --shadows-of-time: #29826d;
  --shadows-of-time-rgb: 41 130 109;
  --shadows-of-time-oklch: oklch(0.548 0.09 173.9);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(166 52% 34%);
  border-color: oklch(0.548 0.09 173.9);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #29826d;
  --color-shadows-of-time-50: #dcfef4;
  --color-shadows-of-time-100: #caf2e7;
  --color-shadows-of-time-200: #ace1d3;
  --color-shadows-of-time-300: #85c7b5;
  --color-shadows-of-time-400: #61b09a;
  --color-shadows-of-time-500: #369981;
  --color-shadows-of-time-600: #30826e;
  --color-shadows-of-time-700: #266858;
  --color-shadows-of-time-800: #1b4c3f;
  --color-shadows-of-time-900: #12352b;
  --color-shadows-of-time-950: #042018;
}

SCSS

$shadows-of-time: #29826d;
$shadows-of-time-rgb: 41, 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);
}