Examine source code of Black desing 2.0

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Black desing 2.0",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-009-f069b97f439938a011297c84464f0df6.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(40, 40, 40)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(79, 79, 79)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(46, 46, 46)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(35, 35, 35)",
      "icons_attention": "rgb(255, 64, 64)",
      "icons": "rgb(220, 220, 220)",
      "ntp_background": "rgb(231, 231, 231)",
      "tab_background_separator": "rgb(52, 52, 52)",
      "tab_loading": "rgb(0, 13, 37)",
      "tab_selected": "rgb(61, 61, 61)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(40, 40, 40)",
      "toolbar_field_border_focus": "rgb(255, 255, 255)",
      "toolbar_field_border": "rgb(255, 255, 255)",
      "toolbar_field_focus": "rgb(255, 255, 255)",
      "toolbar_field_separator": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgb(40, 40, 40)"
    }
  }
}