#34785C

CSS

:root {
  --greasy-greens: #34785c;
  --greasy-greens-rgb: 52 120 92;
  --greasy-greens-oklch: oklch(0.52 0.083 163.9);
}

.element {
  color: var(--greasy-greens);
  background-color: hsl(155 40% 34%);
  border-color: oklch(0.52 0.083 163.9);
}

Tailwind CSS v4

@theme {
  --color-greasy-greens: #34785c;
  --color-greasy-greens-50: #e0fdf0;
  --color-greasy-greens-100: #cff1e1;
  --color-greasy-greens-200: #b4e0cc;
  --color-greasy-greens-300: #8fc5ae;
  --color-greasy-greens-400: #6fae91;
  --color-greasy-greens-500: #4c9877;
  --color-greasy-greens-600: #418065;
  --color-greasy-greens-700: #346751;
  --color-greasy-greens-800: #254b39;
  --color-greasy-greens-900: #193427;
  --color-greasy-greens-950: #092015;
}

SCSS

$greasy-greens: #34785c;
$greasy-greens-rgb: 52, 120, 92;
$greasy-greens-light: mix(#fff, $greasy-greens, 20%);
$greasy-greens-dark: mix(#000, $greasy-greens, 20%);

.element {
  color: $greasy-greens;
  box-shadow: 0 0 0 2px rgba($greasy-greens, 0.35);
}