Examine source code of colour buttons

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "colour buttons",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(153, 253, 85, 0)",
      "toolbar_text": "rgb(237, 240, 238)",
      "frame": "rgb(31, 36, 221)",
      "tab_background_text": "rgb(245, 248, 242)",
      "toolbar_field": "rgba(250, 251, 255, 0.57)",
      "toolbar_field_text": "rgb(25, 15, 233)",
      "tab_line": "rgb(235, 241, 236)",
      "popup": "rgb(253, 111, 224)",
      "popup_text": "rgb(18, 40, 22)",
      "tab_loading": "rgb(235, 241, 236)"
    }
  }
}