Examine source code of Light Black Theme

{
  "manifest_version": 2,

  "applications": {
    "gecko": {
      "id": "light-black-theme@mnp",
      "strict_min_version": "58.0"
    }
  },

  "name": "Light Black Theme",
  "version": "1.2",
  "description": "Light Black Theme For Firefox",

  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
    "theme": {
      "colors": {
           "tab_line": "rgb(0,0,0)",
            "tab_background_text": "#00BFFF",
            "textcolor": "#00BFFF",
            "frame": "rgb(28,28,28)",
            "accentcolor": "rgb(50,50,50)",
            "tab_loading": "rgb(0,60,90)", 
            "icons": "rgb(249, 249, 250, 0.7)", //"icons": "#d7d8da",
            "icons_attention": "#00bbff",

            "toolbar": "#404040",
            "bookmark_text": "#00BFFF",
            "toolbar_text": "#00BFFF",
            "toolbar_top_separator": "#242424",
            "toolbar_bottom_separator": "#242424",
            "toolbar_vertical_separator": "#242424",

            "toolbar_field": "rgba(0,0,0,0.5)",
            "toolbar_field_text": "#00BFFF",
            "toolbar_field_focus": "rgb(0,0,0)",
            "toolbar_field_border": "rgb(0,0,0)",
            "toolbar_field_separator": "rgba(98,98,98,0.2)",
            "toolbar_field_border_focus": "rgb(0,0,0)",

            "button_background_hover": "rgba(179,179,181,0.4)",
            "button_background_active": "rgb(0,60,90)",

            "popup": "rgb(48,48,48)",
            "popup_text": "#00BFFF",
            "popup_border": "rgb(48,48,48)",
            "popup_highlight": "rgb(0,60,90)",
            "popup_highlight_text": "rgb(120,120,120)",

            "ntp_text": "#00BFFF",
            "ntp_background": "rgb(27,27,29)",

            "sidebar": "rgb(48,48,48)",
            "sidebar_text": "rgb(0, 191, 255)",
            "sidebar_border": "rgb(48,48,48)",
            "sidebar_highlight": "rgb(0,116,232)",
            "sidebar_highlight_text": "rgb(0, 191, 255)"
        }
    }
}