Examine source code of Blue Gradient theme

{
  "manifest_version": 2,
  "version": "1.1.1",
  "name": "Lavender Gradient theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(225, 244, 255)",
      "toolbar_text": "rgb(92, 43, 227)",
      "frame": "rgb(255, 255, 255)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(183, 229, 255)",
      "toolbar_field_text": "rgb(62, 70, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(225, 244, 255)",
      "popup_text": "rgb(8, 39, 238)",
      "button_background_active": "rgb(190, 255, 245)",
      "button_background_hover": "rgb(226, 243, 249)",
      "frame_inactive": "rgb(183, 163, 255)",
      "icons_attention": "rgb(13, 187, 253)",
      "icons": "rgb(49, 94, 255)",
      "ntp_background": "rgb(170, 195, 249)",
      "popup_border": "rgb(96, 255, 230)",
      "popup_highlight_text": "rgb(0, 0, 0)",
      "popup_highlight": "rgb(225, 244, 255)",
      "sidebar_highlight_text": "rgb(137, 119, 230)",
      "sidebar_text": "rgb(35, 123, 189)",
      "tab_background_separator": "rgb(250, 253, 254)",
      "tab_loading": "rgb(193, 212, 255)",
      "tab_text": "rgb(50, 80, 203)",
      "toolbar_bottom_separator": "rgb(96, 255, 230)",
      "toolbar_field_border_focus": "rgb(96, 255, 230)",
      "toolbar_field_border": "rgb(190, 255, 245)",
      "toolbar_field_focus": "rgb(175, 225, 255)",
      "toolbar_field_highlight_text": "rgb(59, 214, 190)",
      "toolbar_field_separator": "rgb(96, 255, 230)",
      "toolbar_top_separator": "rgb(96, 255, 230)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6bc9313c-820f-4dd1-9843-50fd8443edc0}"
    }
  }
}