Examine source code of Sam's theme

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#0e29f5",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Sam's theme",
  "manifest_version": 2,
  "description": "i maed this\ni needed a custom theme, use it if you like"
}