Examine source code of prem theme

{
  "name": "prem theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot 2023-05-06 at 17.46.06.png"
    },
    "colors": {
      "frame": "rgba(0, 247, 255, 1)",
      "tab_background_text": "rgba(73, 55, 102, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(73, 55, 102, 1)",
      "tab_line": "rgba(73, 55, 102, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{269f257a-fb1b-40a1-91c6-a2914c0892c6}"
    }
  }
}