At the time, every other flipper out there had been installing white cabinetry but we wanted to separate ourselves from the pack so we went with a darker, pepper-corn color.

@Juliet Hawthorn this is a relatively simple no with shades of grey.

The other thing that you could consider is replacing all the blinds with new ones of the same (matching) type, and if so I'd suggest something like a cellular shade or a roller blind like mecho-shade (that's a personal preference). 

@Lesley ResnickThere is a road about 30 mins from me in NJ called Shades of Death Rd

Anything else you see stained darker was original wood that I refinished.

Echo what @Casey Christensen said just to drive home the point.With so many people involved you would be ten shades of crazy to not get an LLC created and some solid articles of organization defined to figure out how you will handle all the different situations that WILL occur when one of the five you gets mad, feels like they are working harder than the rest, has covered more expenses than someone else, or one of a million different issues.Before you all even buy your first property you all need to talk about the worse case scenario and agree how you want to handle it.

@John Thedford I can’t tell if your throwing shade my way or not lol.

How you do that is with a piece of horizontal trim right about the place where the first and second floor meet, preferably with a darker color siding above that dividing line.

Also, if we paint the kitchen would a very light peach be alright [with darker, but still light peach for the walls] or should we stick to white?

Cabinets should not be discolored at all,  I can see minor nicks and scratches, but there should be nothing that you can't take a touch up marker and fill in to make it darker.