Examine source code of Dark Piano1

{
  "name": "Dark Piano1",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(19, 32, 33, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 252, 252, 1)",
      "toolbar_field": "rgba(18, 30, 31, 0.26)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "toolbar_field_border": "rgba(80, 80, 80, 1)",
      "ntp_background": "rgba(28, 28, 28, 1)",
      "ntp_text": "rgba(170, 170, 170, 1)"
    }
  }
}