chromium/chrome/test/data/extensions/theme_with_attribution/manifest.json

{
   "name": "attribution theme",
  "manifest_version": 2,
   "theme": {
      "colors": {
         "frame": [ 158, 210, 242 ],
         "ntp_link": [ 14, 107, 164 ],
         "ntp_section": [ 213, 233, 245 ],
         "toolbar": [ 187, 221, 247 ]
      },
      "images": {
         "theme_frame": "images/theme_frame_snow.png",
         "theme_ntp_background": "images/theme_ntp_background.png",
         "theme_toolbar": "images/theme_toolbar_snow.png",
         "theme_ntp_attribution": "images/theme_ntp_background.png"
      },
      "tints": {
         "buttons": [ 0.6, 0.66, 0.6 ],
         "frame_inactive": [ -1.0, -1.0, 0.6 ]
      }
   },
   "version": "1.4"
}