Examine source code of Caffeine love

{
  "theme": {
    "images": {
      "theme_frame": "caffeine_love3.png"
    },
    "colors": {
      "frame": "#d4c5c5",
      "tab_background_text": "#ccc2c2"
    }
  },
  "version": "2.0",
  "name": "Caffeine love",
  "manifest_version": 2,
  "description": "Expressing my love of caffeine, with molecules! Since this was my first, I wanted something easy (and lines certainly are!), but also something I wanted to use. There seems to be a lack of caffeine related ones, so here we go! I made this is Sumopaint."
}