Examine source code of Blue Velvet

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue Velvet",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(3, 19, 66, 0)",
      "toolbar_text": "rgb(255, 0, 179)",
      "frame": "rgb(2, 32, 133)",
      "tab_background_text": "rgb(15, 191, 232)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(0, 138, 255)",
      "tab_line": "rgb(255, 0, 0)",
      "popup": "rgb(8, 26, 83)",
      "popup_text": "rgba(247, 44, 187, 0.9)",
      "button_background_active": "rgb(3, 19, 66)",
      "button_background_hover": "rgba(23, 104, 181, 0.66)",
      "icons_attention": "rgb(201, 72, 255)",
      "popup_border": "rgb(17, 184, 223)",
      "popup_highlight_text": "rgb(15, 191, 232)",
      "tab_loading": "rgb(255, 0, 0)"
    }
  }
}