Examine source code of Themer_First

{
  "name": "Themer_First",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "371577.jpg"
    },
    "colors": {
      "frame": "rgba(136, 159, 209, 1)",
      "tab_background_text": "rgba(201, 109, 109, 1)",
      "toolbar": "rgba(189, 128, 128, 1)",
      "bookmark_text": "rgba(199, 173, 173, 1)",
      "toolbar_field": "rgba(75, 217, 70, 1)",
      "toolbar_field_text": "rgba(199, 95, 95, 1)"
    }
  }
}