#1C341D

CSS

:root {
  --dark-serpent: #1c341d;
  --dark-serpent-rgb: 28 52 29;
  --dark-serpent-oklch: oklch(0.298 0.051 145.1);
}

.element {
  color: var(--dark-serpent);
  background-color: hsl(122 30% 16%);
  border-color: oklch(0.298 0.051 145.1);
}

Tailwind CSS v4

@theme {
  --color-dark-serpent: #1c341d;
  --color-dark-serpent-50: #ecf9ed;
  --color-dark-serpent-100: #ddedde;
  --color-dark-serpent-200: #c7dbc8;
  --color-dark-serpent-300: #a7bfa9;
  --color-dark-serpent-400: #8ca78c;
  --color-dark-serpent-500: #718f72;
  --color-dark-serpent-600: #607960;
  --color-dark-serpent-700: #4d614d;
  --color-dark-serpent-800: #384737;
  --color-dark-serpent-900: #263126;
  --color-dark-serpent-950: #151d14;
}

SCSS

$dark-serpent: #1c341d;
$dark-serpent-rgb: 28, 52, 29;
$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);
}