Examine source code of Polka-dot Pretty

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Polka-dot Pretty",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-004-411c27df18d2f86bd8790aa4a1bde85f.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.43)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(233, 196, 209)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(233, 196, 209)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(0, 0, 0)",
      "button_background_hover": "rgb(233, 196, 209)",
      "frame_inactive": "rgb(233, 196, 209)",
      "icons_attention": "rgb(233, 196, 209)",
      "icons": "rgb(0, 0, 0)",
      "ntp_background": "rgb(233, 196, 209)",
      "ntp_text": "rgb(0, 0, 0)",
      "popup_border": "rgb(0, 0, 0)",
      "popup_highlight_text": "rgb(0, 0, 0)",
      "popup_highlight": "rgb(233, 196, 209)",
      "sidebar_border": "rgb(233, 196, 209)",
      "sidebar_highlight_text": "rgb(233, 196, 209)",
      "sidebar_highlight": "rgb(233, 196, 209)",
      "sidebar_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3356f63e-de9b-49db-a699-837e66636e8b}"
    }
  }
}