#00856F

CSS

:root {
  --shadows-of-time: #00856f;
  --shadows-of-time-rgb: 0 133 111;
  --shadows-of-time-oklch: oklch(0.551 0.103 175.6);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(170 100% 26%);
  border-color: oklch(0.551 0.103 175.6);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #00856f;
  --color-shadows-of-time-50: #d7fff5;
  --color-shadows-of-time-100: #c4f4e7;
  --color-shadows-of-time-200: #a5e3d4;
  --color-shadows-of-time-300: #7ac9b7;
  --color-shadows-of-time-400: #51b29c;
  --color-shadows-of-time-500: #109c83;
  --color-shadows-of-time-600: #15846f;
  --color-shadows-of-time-700: #126a59;
  --color-shadows-of-time-800: #0d4e3f;
  --color-shadows-of-time-900: #08362c;
  --color-shadows-of-time-950: #002119;
}

SCSS

$shadows-of-time: #00856f;
$shadows-of-time-rgb: 0, 133, 111;
$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);
}