Why do you use 'HDR+ Enhanced' to take this picture?
'HDR+ Enhanced' doesn't make pictures better all the time and this is valid also for Pixel 2 devices.
'HDR+ Enhanced' is for very difficult light situations and it has consequences every time we use it.
The problem we're facing here (with Google Camera on our G6s) it's to find a compromise to get the best quality images knowing that Google Camera has not been build for our G6s. This compromise must take in account very low light conditions in both artificial and natural light, bright light conditions and AWB issues (AWB is far to be perfect... and it has been developed by Google!)
Maybe it's possible tweaking more colour calibration settings I proposed to @Arnova8G2 but remember that it won't be perfect in all situations. This is also valid for Google calibration for their Pixel 2 phones. I'm still working with @Arnova8G2 and
@cstark27 to find better settings but every time we change a single setting, they have to rebuild the version. That takes time and a lot of work.
In other words, if you don't want to get this greenish colour on daylight you'll get other issues on natural or artificial low light like magenta cast. The whole point is to find a compromise to get the best image results under all conditions. Besides, you get the greenish colour because you're using wrong settings to take this picture. Then I repeat, my first question: Why do you need to take this picture with 'HDR+ Enhanced' when you'll get better results even without HDR+ in such light conditions? You can also drive a car at 40km/h in 4th gear but you won't be happy because it has not power. This is the same thing.
Regards,