#298366

CSS

:root {
  --shadows-of-time: #298366;
  --shadows-of-time-rgb: 41 131 102;
  --shadows-of-time-oklch: oklch(0.549 0.096 167.6);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(161 52% 34%);
  border-color: oklch(0.549 0.096 167.6);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #298366;
  --color-shadows-of-time-50: #dbfff1;
  --color-shadows-of-time-100: #c9f3e3;
  --color-shadows-of-time-200: #ace2ce;
  --color-shadows-of-time-300: #85c8af;
  --color-shadows-of-time-400: #61b193;
  --color-shadows-of-time-500: #369a79;
  --color-shadows-of-time-600: #308267;
  --color-shadows-of-time-700: #266952;
  --color-shadows-of-time-800: #1b4d3a;
  --color-shadows-of-time-900: #123528;
  --color-shadows-of-time-950: #042016;
}

SCSS

$shadows-of-time: #298366;
$shadows-of-time-rgb: 41, 131, 102;
$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);
}