Examine source code of Budgies

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Budgies",
  "manifest_version": 2,
  "description": "Theme shows budgies and fits for several desktop resolutions like 1280, 1440, 1650, 1920, theoretically any. Background color changes from left to right in the birds colors from green to yellow.\nThis Theme should not be used with more than one toolbar because of the height of the browsers head it would not look nice anymore."
}