#25836E

CSS

:root {
  --shadows-of-time: #25836e;
  --shadows-of-time-rgb: 37 131 110;
  --shadows-of-time-oklch: oklch(0.55 0.092 174.5);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(167 56% 33%);
  border-color: oklch(0.55 0.092 174.5);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #25836e;
  --color-shadows-of-time-50: #dbfef4;
  --color-shadows-of-time-100: #c9f3e7;
  --color-shadows-of-time-200: #abe2d3;
  --color-shadows-of-time-300: #83c7b6;
  --color-shadows-of-time-400: #5eb09b;
  --color-shadows-of-time-500: #319a82;
  --color-shadows-of-time-600: #2c826e;
  --color-shadows-of-time-700: #236858;
  --color-shadows-of-time-800: #194d3f;
  --color-shadows-of-time-900: #10352b;
  --color-shadows-of-time-950: #032019;
}

SCSS

$shadows-of-time: #25836e;
$shadows-of-time-rgb: 37, 131, 110;
$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);
}