I'm trying to set up Krita so I can have a reference picture in one view on my second monitor, and my actual sketch in the first view on my main monitor. I finally got the two views of the same picture on different monitors to work, but when I try to use the color picker on the reference image, it doesn't register it for the main view. Basically if I have orange selected in my main view that I'm sketching in, then I go up to my top monitor and pick a red color, the color wheel on the top view shows red but the main view doesn't show any change and still has the orange color. I don't know if it's possible to pick the color from another window and have it transfer to my main window, but that's how I'd ideally like to set it up. (Also sorry if this is formatted weirdly or something, this is my first time using the forums)

No, that's not possible. The current foreground and background color are set per window, not globally for all windows.

There is a way of doing it which could be messy:
If your 'top' monitor is the same resolution as your 'bottom' monitor, you can resize the main window to cover both monitors. This would have the consequence of splitting dockers between monitors which may or may not be acceptable/usable.
Then, you can set multiple documents to Subwindows and place the image for reference on the top monitor and have your working image on the bottom monitor.

I have two identical monitors side by side and sometimes use this method to give me a very large working area but it's quite good with that particular arrangement. I don't think it could be made to be as usable with an upper/lower arrangement, especially if the monitors are of different resolutions.