How to change colors of address bar (omnibox) in a Chrome theme?

Question

Chrome recently got an update (at least in Canary) where you can modify Chrome themes and change the background and text colors of the address bar. However, I could not find out the syntax or key words needed to change these colors.

The following is from the manifest.json file of a theme called Just Black. I added "omnibox_background": [ 65, 65, 65 ] but it didn't change background color of address bar.

{
   "description": "Just Black: when you're feeling extra moody",
   "key": "(long random string of characters)",
   "manifest_version": 2,
   "name": "Just Black",
   "theme": {
      "colors": {
         "bookmark_text": [ 255, 255, 255 ],
         "frame": [ 0, 0, 0 ],
         "ntp_background": [ 0, 0, 0 ],
         "ntp_text": [ 125, 134, 142 ],
         "tab_background_text": [ 255, 255, 255 ],
         "tab_background_text_inactive": [ 255, 255, 255 ],
         "tab_background_text_incognito": [ 255, 255, 255 ],
         "tab_background_text_incognito_inactive": [ 255, 255, 255 ],
         "tab_text": [ 255, 255, 255 ],
         "toolbar": [ 45, 45, 45 ],
         "omnibox_background": [ 65, 65, 65 ]
      },
      "tints": {
         "buttons": [ 0.2, 0.2, 0.9 ],
         "frame_inactive": [ -1, -1, -1 ],
         "frame_incognito": [ -1, -1, -1 ],
         "frame_incognito_inactive": [ -1, -1, -1 ]
      }
   },
   "update_url": "https://clients2.google.com/service/update2/crx",
   "version": "2"
}

Answer 1

I know I'm four months late but you actually can you were on the right track, but if you copy and paste this into the manifest, (highlight the whole manifest), then go to chrome://extensions, click Load unpacked extensions in the top right, then find the theme file and click select folder then it should work and if it doesn't, contact me by this thread again (edit: you can also change the "omnibox_background": [65, 65, 65] and "omnibox_text": [255, 255, 255] RGB values to the RGB values of your choosing)

{
   "description": "Just Black: when you're feeling extra moody",
   "key": "(long random string of characters)",
   "manifest_version": 2,
   "name": "Just Black",
   "theme": {
      "colors": {
         "bookmark_text": [ 255, 255, 255 ],
         "frame": [ 0, 0, 0 ],
         "ntp_background": [ 0, 0, 0 ],
         "ntp_text": [ 125, 134, 142 ],
         "omnibox_background": [ 65, 65, 65 ],
         "omnibox_text": [ 255, 255, 255 ],
         "tab_background_text": [ 255, 255, 255 ],
         "tab_background_text_inactive": [ 255, 255, 255 ],
         "tab_background_text_incognito": [ 255, 255, 255 ],
         "tab_background_text_incognito_inactive": [ 255, 255, 255 ],
         "tab_text": [ 255, 255, 255 ],
         "toolbar": [ 45, 45, 45 ],
      },
      "tints": {
         "buttons": [ 0.2, 0.2, 0.9 ],
         "frame_inactive": [ -1, -1, -1 ],
         "frame_incognito": [ -1, -1, -1 ],
         "frame_incognito_inactive": [ -1, -1, -1 ]
      }
   },
   "update_url": "https://clients2.google.com/service/update2/crx",
   "version": "2"
}