#1E351C

CSS

:root {
  --dark-serpent: #1e351c;
  --dark-serpent-rgb: 30 53 28;
  --dark-serpent-oklch: oklch(0.302 0.053 142.4);
}

.element {
  color: var(--dark-serpent);
  background-color: hsl(115 31% 16%);
  border-color: oklch(0.302 0.053 142.4);
}

Tailwind CSS v4

@theme {
  --color-dark-serpent: #1e351c;
  --color-dark-serpent-50: #ecf9ec;
  --color-dark-serpent-100: #deeddd;
  --color-dark-serpent-200: #c7dbc7;
  --color-dark-serpent-300: #a8bfa7;
  --color-dark-serpent-400: #8da78a;
  --color-dark-serpent-500: #728f6f;
  --color-dark-serpent-600: #61795e;
  --color-dark-serpent-700: #4d614b;
  --color-dark-serpent-800: #394736;
  --color-dark-serpent-900: #273125;
  --color-dark-serpent-950: #151d13;
}

SCSS

$dark-serpent: #1e351c;
$dark-serpent-rgb: 30, 53, 28;
$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);
}