Examine source code of Simple Yellow

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "KIA Yellow",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(28, 58, 80, 0.2)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(5, 20, 31)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(5, 20, 31)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(243, 195, 0)",
      "popup": "rgb(5, 20, 31)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgba(255, 255, 255, 0.15)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(5, 20, 31)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgb(243, 195, 0)",
      "tab_selected": "rgba(93, 125, 43, 0)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border": "rgb(243, 195, 0)",
      "toolbar_field_highlight": "rgba(243, 195, 0, 0.5)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "tab_loading": "rgb(243, 195, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5c07c633-a344-410c-a4d5-a48725a1aefa}"
    }
  }
}