Examine source code of plain-vivid-magenta

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#3c1045"
    }
  },
  "version": "2.0",
  "name": "plain-vivid-magenta",
  "manifest_version": 2,
  "description": "I think this is too vivid for daily use.\nPlease use this when you want to change your mood."
}