Examine source code of Protein Black

{
  "theme": {
    "images": {
      "theme_frame": "untitleda2.png"
    },
    "colors": {
      "frame": "#bab6b6",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Protein Black",
  "manifest_version": 2,
  "description": "Crystal structure of Archaeoglobus fulgidus PCNA monomer complexed with Fen1 PIP peptide (PDB code 1rxj, rendered using MacPyMOL 0.99)"
}