Examine source code of Neko Ears

{
  "name": "Neko Ears",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "865413378734424064.png"
    },
    "colors": {
      "frame": "rgba(250, 205, 248, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(198, 240, 247, 0.6)",
      "toolbar_field": "rgba(180, 222, 250, 0.65)",
      "tab_line": "rgba(92, 209, 255, 1)"
    }
  }
}