Examine source code of Bright Contrast

{
  "name": "Bright Contrast",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "X26.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(30, 255, 0, 0.49)",
      "bookmark_text": "rgba(204, 0, 255, 1)",
      "toolbar_field": "rgba(115, 0, 255, 0.62)",
      "toolbar_field_text": "rgba(255, 184, 51, 1)"
    }
  }
}