Examine source code of Green Hour Themer

{
  "version": "5.0.1",
  "manifest_version": 2,
  "name": "Themer My Color Set Dark",
  "theme": {
    "colors": {
      "bookmark_text": [
        140,
        180,
        84
      ],
      "frame": [
        24,
        27,
        24
      ],
      "frame_inactive": [
        41,
        49,
        33
      ],
      "icons_attention": [
        140,
        180,
        84
      ],
      "icons": [
        140,
        180,
        84
      ],
      "ntp_background": [
        41,
        49,
        33
      ],
      "ntp_text": [
        140,
        180,
        84
      ],
      "popup_highlight_text": [
        57,
        71,
        41
      ],
      "popup_highlight": [
        123,
        158,
        75
      ],
      "toolbar_field_highlight_text": [
        57,
        71,
        41
      ],
      "popup_border": [
        41,
        49,
        33
      ],
      "popup_text": [
        140,
        180,
        84
      ],
      "popup": [
        41,
        49,
        33
      ],
      "sidebar_border": [
        41,
        49,
        33
      ],
      "sidebar_highlight_text": [
        123,
        158,
        75
      ],
      "sidebar_highlight": [
        57,
        71,
        41
      ],
      "sidebar_text": [
        123,
        158,
        75
      ],
      "sidebar": [
        41,
        49,
        33
      ],
      "tab_background_text": [
        140,
        180,
        84
      ],
      "tab_loading": [
        140,
        180,
        84
      ],
      "tab_text": [
        140,
        180,
        84
      ],
      "toolbar_bottom_separator": [
        41,
        49,
        33
      ],
      "toolbar_field_border": [
        41,
        49,
        33
      ],
      "toolbar_field_separator": [
        41,
        49,
        33
      ],
      "toolbar_field_text_focus": [
        140,
        180,
        84
      ],
      "toolbar_field_text": [
        140,
        180,
        84
      ],
      "toolbar_field": [
        41,
        49,
        33
      ],
      "toolbar_field_border_focus": [
        57,
        71,
        41
      ],
      "toolbar": [
        41,
        49,
        33
      ]
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9d41f6dd-9e01-4843-bb84-b59a4a21c9a0}"
    }
  }
}