#35816B

CSS

:root {
  --shadows-of-time: #35816b;
  --shadows-of-time-rgb: 53 129 107;
  --shadows-of-time-oklch: oklch(0.549 0.083 171.3);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(163 42% 36%);
  border-color: oklch(0.549 0.083 171.3);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #35816b;
  --color-shadows-of-time-50: #defdf3;
  --color-shadows-of-time-100: #cdf1e5;
  --color-shadows-of-time-200: #b0e0d1;
  --color-shadows-of-time-300: #8bc6b3;
  --color-shadows-of-time-400: #69af98;
  --color-shadows-of-time-500: #43987f;
  --color-shadows-of-time-600: #3a816c;
  --color-shadows-of-time-700: #2e6756;
  --color-shadows-of-time-800: #214c3e;
  --color-shadows-of-time-900: #16352a;
  --color-shadows-of-time-950: #072018;
}

SCSS

$shadows-of-time: #35816b;
$shadows-of-time-rgb: 53, 129, 107;
$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);
}