#0E3012

CSS

:root {
  --dark-serpent: #0e3012;
  --dark-serpent-rgb: 14 48 18;
  --dark-serpent-oklch: oklch(0.276 0.066 145.7);
}

.element {
  color: var(--dark-serpent);
  background-color: hsl(127 55% 12%);
  border-color: oklch(0.276 0.066 145.7);
}

Tailwind CSS v4

@theme {
  --color-dark-serpent: #0e3012;
  --color-dark-serpent-50: #e9fbeb;
  --color-dark-serpent-100: #daeedc;
  --color-dark-serpent-200: #c2dcc5;
  --color-dark-serpent-300: #a1c1a4;
  --color-dark-serpent-400: #86a987;
  --color-dark-serpent-500: #6a926c;
  --color-dark-serpent-600: #5a7c5b;
  --color-dark-serpent-700: #486349;
  --color-dark-serpent-800: #354834;
  --color-dark-serpent-900: #243223;
  --color-dark-serpent-950: #131e12;
}

SCSS

$dark-serpent: #0e3012;
$dark-serpent-rgb: 14, 48, 18;
$dark-serpent-light: mix(#fff, $dark-serpent, 20%);
$dark-serpent-dark: mix(#000, $dark-serpent, 20%);

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