#168665

CSS

:root {
  --shadows-of-time: #168665;
  --shadows-of-time-rgb: 22 134 101;
  --shadows-of-time-oklch: oklch(0.553 0.108 167);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(162 72% 31%);
  border-color: oklch(0.553 0.108 167);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #168665;
  --color-shadows-of-time-50: #d8fff0;
  --color-shadows-of-time-100: #c6f4e2;
  --color-shadows-of-time-200: #a7e4cc;
  --color-shadows-of-time-300: #7dcaae;
  --color-shadows-of-time-400: #57b391;
  --color-shadows-of-time-500: #219c77;
  --color-shadows-of-time-600: #208465;
  --color-shadows-of-time-700: #1a6a51;
  --color-shadows-of-time-800: #134e39;
  --color-shadows-of-time-900: #0c3627;
  --color-shadows-of-time-950: #002115;
}

SCSS

$shadows-of-time: #168665;
$shadows-of-time-rgb: 22, 134, 101;
$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);
}