#2F826C

CSS

:root {
  --shadows-of-time: #2f826c;
  --shadows-of-time-rgb: 47 130 108;
  --shadows-of-time-oklch: oklch(0.55 0.087 172.4);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(164 47% 35%);
  border-color: oklch(0.55 0.087 172.4);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #2f826c;
  --color-shadows-of-time-50: #ddfef3;
  --color-shadows-of-time-100: #cbf2e6;
  --color-shadows-of-time-200: #aee1d2;
  --color-shadows-of-time-300: #87c6b4;
  --color-shadows-of-time-400: #64af99;
  --color-shadows-of-time-500: #3c9980;
  --color-shadows-of-time-600: #35816c;
  --color-shadows-of-time-700: #2a6857;
  --color-shadows-of-time-800: #1e4c3e;
  --color-shadows-of-time-900: #14352b;
  --color-shadows-of-time-950: #052018;
}

SCSS

$shadows-of-time: #2f826c;
$shadows-of-time-rgb: 47, 130, 108;
$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);
}