I'm in the same boat unfortunately. Will be keeping an eye out here for a fix.

I am having the same problem.  
 
Would be nice if we could get a member of the team to help or at least acknowledge the problem.

Breakthrough! It's not complete but it's something. Until they smooth this feature out or someone digs deeper into these values below.
 
I've found that in C:\Users\USERNAME\AppData\Local\EVGA_Co.,_Ltd\PrecisionX_x64.exe_Url_vrvasebqwl5wesi2q3tshmshuzsvqfah\1.1.0.11 there is a user.config-file
 
Opening in notepad and going down a few lines you find this
 

<LedDatas>
 <LedData>
 <IsSLI>false</IsSLI>
 <Device>0</Device>
 <LedMode>StaticOn</LedMode>
 <Color_StaticOn>
 <A>255</A>
 <R>0</R>
 <G>255</G>
 <B>0</B>
 <ScA>1</ScA>
 <ScR>0</ScR>
 <ScG>1</ScG>
 <ScB>0</ScB>

 
Changing value G to something else and enabling the other color channels (the "ScX"-variables) you can get the card to default to something other than bright green. IE if you want to blend in red you have to change the "ScR" value to 1 also.
 
"A" should logically just stand for Alpha but changing its value does nothing for me. Not getting down brightness for example.
 
For example, my "maximum blue" looks like this

<LedDatas>
<LedData>
 <IsSLI>false</IsSLI>
 <Device>0</Device>
 <LedMode>StaticOn</LedMode>
 <Color_StaticOn>
<A>255</A>
 <R>0</R>
 <G>0</G>
 <B>255</B>
 <ScA>1</ScA>
 <ScR>0</ScR>
 <ScG>0</ScG>
 <ScB>1</ScB>

 

hmmm, 
I don't see any of that in my config file.  I see "Tempcolorsettings" only
 
 

yeah it's not there