Examine source code of senko-san <3

{
  "name": "YEYY",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "please.png"
    },
    "colors": {
      "frame": "rgba(56, 91, 163, 0)",
      "tab_background_text": "rgba(252, 239, 239, 1)",
      "toolbar": "rgba(201, 0, 54, 0.19)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(227, 227, 227, 0.91)",
      "toolbar_field_text": "rgba(163, 83, 102, 1)"
    }
  }
}