#008265

CSS

:root {
  --shadows-of-time: #008265;
  --shadows-of-time-rgb: 0 130 101;
  --shadows-of-time-oklch: oklch(0.54 0.107 170.1);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(167 100% 25%);
  border-color: oklch(0.54 0.107 170.1);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #008265;
  --color-shadows-of-time-50: #d8fff2;
  --color-shadows-of-time-100: #c5f4e4;
  --color-shadows-of-time-200: #a5e4cf;
  --color-shadows-of-time-300: #7ccab1;
  --color-shadows-of-time-400: #54b395;
  --color-shadows-of-time-500: #199c7b;
  --color-shadows-of-time-600: #1b8468;
  --color-shadows-of-time-700: #166a53;
  --color-shadows-of-time-800: #104e3b;
  --color-shadows-of-time-900: #0a3629;
  --color-shadows-of-time-950: #002116;
}

SCSS

$shadows-of-time: #008265;
$shadows-of-time-rgb: 0, 130, 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);
}