Examine source code of Black Acryl

{
  "theme": {
    "images": {
      "theme_frame": "blackglass_header.png"
    },
    "colors": {
      "frame": "#3c4285",
      "tab_background_text": "#787878"
    }
  },
  "version": "2.0",
  "name": "Black Acryl",
  "manifest_version": 2,
  "description": "Feel the black glass with a taste of blue light..."
}