Examine source code of Something blueish

{
  "theme": {
    "images": {
      "theme_frame": "sin1.png"
    },
    "colors": {
      "frame": "#851181",
      "tab_background_text": "#bab6b6"
    }
  },
  "version": "2.0",
  "name": "Something blueish",
  "manifest_version": 2,
  "description": "Simple gradient colour theme."
}