#1F8569

CSS

:root {
  --shadows-of-time: #1f8569;
  --shadows-of-time-rgb: 31 133 105;
  --shadows-of-time-oklch: oklch(0.553 0.1 169.7);
}

.element {
  color: var(--shadows-of-time);
  background-color: hsl(164 62% 32%);
  border-color: oklch(0.553 0.1 169.7);
}

Tailwind CSS v4

@theme {
  --color-shadows-of-time: #1f8569;
  --color-shadows-of-time-50: #d9fff2;
  --color-shadows-of-time-100: #c7f3e4;
  --color-shadows-of-time-200: #a9e3cf;
  --color-shadows-of-time-300: #80c9b1;
  --color-shadows-of-time-400: #5bb295;
  --color-shadows-of-time-500: #2a9b7c;
  --color-shadows-of-time-600: #278369;
  --color-shadows-of-time-700: #1f6954;
  --color-shadows-of-time-800: #164d3b;
  --color-shadows-of-time-900: #0e3629;
  --color-shadows-of-time-950: #012117;
}

SCSS

$shadows-of-time: #1f8569;
$shadows-of-time-rgb: 31, 133, 105;
$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);
}