Examine source code of Anime Gray Theme 2

{
  "manifest_version": 2,
  "version": "3.4",
  "name": "AnimeGrayTheme2",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "properties": {
      "color_scheme": "dark",
      "content_color_scheme": "system"
    },
    "colors": {
      "frame": "#627a86",
      "toolbar": "rgba(245, 245, 245, 0)",
      "toolbar_field": "rgba(34, 34, 34, 0.32)",
      "toolbar_text": "white",
      "tab_background_text": "#41535c",
      "tab_text": "black",
      "tab_loading": "#a54f7e",
      "tab_line": "red",
      "ntp_background": "#1e2020",
      "ntp_text": "white",
      "sidebar": "#1e2020",
      "sidebar_text": "white",
      "sidebar_highlight_text": "white",
      "toolbar_field_focus": "#474f53",
      "toolbar_field_border": "#cfcfcf",
      "toolbar_field_border_focus": "black",
      "toolbar_field_text": "white",
      "toolbar_field_text_focus": "white",
      "tab_background_separator": "red"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7377e444-0513-402c-b7a8-c705227e5278}"
    }
  }
}