Examine source code of Bright Skills

{
  "name": "Bright Skills",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "flowers_red_macro_159466_3840x2160.png"
    },
    "colors": {
      "frame": "rgba(96, 101, 112, 1)",
      "tab_background_text": "rgba(227, 204, 204, 1)",
      "toolbar": "rgba(212, 140, 140, 1)",
      "bookmark_text": "rgba(112, 2, 2, 1)",
      "toolbar_field": "rgba(237, 190, 190, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 0, 0, 1)"
    }
  }
}