Examine source code of Ash & Blood

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#bec8d2",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Ash & Blood",
  "manifest_version": 2,
  "description": "Neutral comforting grey/ash background with the standing out red patch on the right, where it does not block tab names and yet gives the unique feel to your browser."
}