Examine source code of Pastelle

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pastelle",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(180, 217, 238)",
      "toolbar_text": "rgb(245, 145, 165)",
      "frame": "rgb(155, 215, 179)",
      "tab_background_text": "rgb(188, 101, 119)",
      "toolbar_field": "rgb(196, 155, 216)",
      "toolbar_field_text": "rgb(4, 4, 11)",
      "tab_line": "rgb(245, 145, 165)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(47, 58, 224)",
      "tab_loading": "rgb(245, 145, 165)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b09050d-837e-45a5-80a8-08faee1772d3}"
    }
  }
}