Examine source code of Nice black (blue)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nice black",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-030-0f935cfde055600d01a959c5c15353de.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(35, 35, 35)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(35, 35, 35)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(35, 35, 35)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(35, 35, 35)",
      "popup": "rgb(35, 35, 35)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_selected": "rgb(168, 188, 255)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgb(61, 61, 61)",
      "toolbar_top_separator": "rgb(35, 35, 35)",
      "tab_loading": "rgb(35, 35, 35)"
    }
  }
}