Examine source code of Purple Triangles

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(40, 8, 88, 0.57)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(50, 9, 130)",
      "tab_background_text": "rgb(225, 215, 239)",
      "toolbar_field": "rgba(73, 54, 89, 0.75)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(154, 35, 205)",
      "popup": "rgb(48, 31, 61)",
      "popup_text": "rgb(227, 215, 239)",
      "tab_loading": "rgb(154, 35, 205)"
    }
  }
}