#058467

CSS

:root {
  --shadows-of-time: #058467;
  --shadows-of-time-rgb: 5 132 103;
  --shadows-of-time-oklch: oklch(0.546 0.107 170.2);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(166 93% 27%);
  border-color: oklch(0.546 0.107 170.2);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #058467;
  --color-shadows-of-time-50: #d7fff2;
  --color-shadows-of-time-100: #c5f4e4;
  --color-shadows-of-time-200: #a5e4cf;
  --color-shadows-of-time-300: #7bcab1;
  --color-shadows-of-time-400: #54b395;
  --color-shadows-of-time-500: #189c7b;
  --color-shadows-of-time-600: #1a8469;
  --color-shadows-of-time-700: #166a54;
  --color-shadows-of-time-800: #104e3b;
  --color-shadows-of-time-900: #0a3629;
  --color-shadows-of-time-950: #002117;
}

SCSS

$shadows-of-time: #058467;
$shadows-of-time-rgb: 5, 132, 103;
$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);
}