Examine source code of idksometheme

{
  "manifest_version": 2,
  "version": "1.56",
  "name": "hii",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-027-1049af643fc55b4ffd4a8575444547c5.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 227, 220)",
      "toolbar_text": "rgb(140, 89, 87)",
      "frame": "rgb(255, 198, 193)",
      "tab_background_text": "rgb(255, 246, 244)",
      "toolbar_field": "rgba(255, 255, 255, 0.69)",
      "toolbar_field_text": "rgb(140, 89, 87)",
      "tab_line": "rgb(140, 89, 87)",
      "popup": "rgb(255, 227, 220)",
      "popup_text": "rgb(140, 89, 87)",
      "button_background_active": "rgb(255, 246, 244, 0.6)",
      "button_background_hover": "rgb(255, 246, 244, 0.3)",
      "icons_attention": "rgb(140, 89, 87)",
      "ntp_background": "rgb(255, 246, 244)",
      "ntp_text": "rgb(140, 89, 87)",
      "popup_border": "rgba(140, 89, 87, 0.75)",
      "popup_highlight_text": "rgba(255, 255, 255, 0.95)",
      "popup_highlight": "rgba(255, 198, 193, 0.7)",
      "sidebar_border": "rgba(140, 89, 87, 0.75)",
      "sidebar_highlight_text": "rgba(255, 255, 255, 0.95)",
      "sidebar_highlight": "rgba(255, 198, 193, 0.7)",
      "sidebar_text": "rgb(140, 89, 87)",
      "sidebar": "rgb(254, 249, 248)",
      "tab_background_separator": "rgb(255, 246, 244)",
      "tab_selected": "rgb(255, 227, 220)",
      "tab_text": "rgb(140, 89, 87)",
      "toolbar_bottom_separator": "rgb(140, 89, 87)",
      "toolbar_field_border_focus": "rgba(140, 89, 87, 0.75)",
      "toolbar_field_border": "rgba(140, 89, 87, 0.5)",
      "toolbar_field_focus": "rgb(254, 249, 248)",
      "toolbar_field_highlight_text": "rgba(255, 255, 255, 0.95)",
      "toolbar_field_highlight": "rgba(255, 198, 193, 0.7)",
      "toolbar_field_separator": "rgba(140, 89, 87, 0.5)",
      "toolbar_field_text_focus": "rgb(140, 89, 87)",
      "toolbar_top_separator": "rgba(140, 89, 87, 0.5)",
      "toolbar_vertical_separator": "rgba(140, 89, 87, 0.5)",
      "tab_loading": "rgb(140, 89, 87)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d7cbd6b-19d6-4709-bcba-dba7856da179}"
    }
  }
}