Examine source code of WAVES2GRN

{
  "name": "WAVES2GRN",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "waves2grn.png"
    },
    "colors": {
      "frame": "rgba(17, 235, 159, 0.63)",
      "tab_background_text": "rgba(195, 250, 237, 1)",
      "toolbar": "rgba(12, 153, 153, 0.2)",
      "bookmark_text": "rgba(195, 250, 237, 1)",
      "toolbar_field": "rgba(70, 219, 160, 0.41)",
      "toolbar_field_text": "rgba(247, 239, 10, 1)"
    }
  }
}