#257A5B

CSS

:root {
  --greasy-greens: #257a5b;
  --greasy-greens-rgb: 37 122 91;
  --greasy-greens-oklch: oklch(0.52 0.095 164.7);
}

.element {
  color: var(--greasy-greens);
  background-color: hsl(158 53% 31%);
  border-color: oklch(0.52 0.095 164.7);
}

Tailwind CSS v4

@theme {
  --color-greasy-greens: #257a5b;
  --color-greasy-greens-50: #ddfeef;
  --color-greasy-greens-100: #cbf3e1;
  --color-greasy-greens-200: #aee2cc;
  --color-greasy-greens-300: #87c7ad;
  --color-greasy-greens-400: #65b090;
  --color-greasy-greens-500: #3d9a76;
  --color-greasy-greens-600: #358264;
  --color-greasy-greens-700: #2a6850;
  --color-greasy-greens-800: #1e4d39;
  --color-greasy-greens-900: #143527;
  --color-greasy-greens-950: #052015;
}

SCSS

$greasy-greens: #257a5b;
$greasy-greens-rgb: 37, 122, 91;
$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);
}