Deke it may or may not help you but I used Eizo Monitor Test and it has a lot of stuff to test monitors with. Getting 3 instances of it running on all 3 monitors was tricky though.
Also there was this monitor test website I found that was good but I forgot the url googling "monitor test website" will find it probably.
Also after I got the main settings down I just took a handfull of pictures I had saved to my computer and put them between monitors to compare how they looked.
I got my monitors nearly 100% matched, the only reason I cant get 100% is because my center monitor is significantly different than my 2 outside monitors for some reason when it comes to green.
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