I hesitate to give any sort of color combination out, as they do change from time to time. Luckily you cannot kill the steppers by wiring them wrong. It is very easy to do. Here are some basics. https://www.vicious1.com/ramps-1-4-board/
There are tons of ramps cases on thingiverse. I have not printed one because I run every board I sell on my machine and run a test pattern. find one with a fan mount, you do not want to seal in all the heat from the drivers.
Just never add or remove any wires to the ramps board while the power and usb are plugged in. I have lost a few boards with the slip of a screw driver or pliers, or missed pin.