Examine source code of GoblinCore

{
  "name": "GoblinCore",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "a55879d34f2b8a5b01eb78381430eafc.jpg"
    },
    "colors": {
      "frame": "rgba(240, 225, 196, 1)",
      "tab_background_text": "rgba(112, 41, 41, 1)",
      "toolbar_field_text": "rgba(158, 66, 66, 1)",
      "tab_line": "rgba(168, 49, 49, 1)"
    }
  }
}