#122D13

CSS

:root {
  --dark-serpent: #122d13;
  --dark-serpent-rgb: 18 45 19;
  --dark-serpent-oklch: oklch(0.268 0.057 144.5);
}

.element {
  color: var(--dark-serpent);
  background-color: hsl(122 43% 12%);
  border-color: oklch(0.268 0.057 144.5);
}

Tailwind CSS v4

@theme {
  --color-dark-serpent: #122d13;
  --color-dark-serpent-50: #ebfaec;
  --color-dark-serpent-100: #dceddd;
  --color-dark-serpent-200: #c5dbc6;
  --color-dark-serpent-300: #a5c0a6;
  --color-dark-serpent-400: #8aa88a;
  --color-dark-serpent-500: #6f916f;
  --color-dark-serpent-600: #5e7a5e;
  --color-dark-serpent-700: #4b624b;
  --color-dark-serpent-800: #374835;
  --color-dark-serpent-900: #263224;
  --color-dark-serpent-950: #141e13;
}

SCSS

$dark-serpent: #122d13;
$dark-serpent-rgb: 18, 45, 19;
$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);
}