You can bend the 5th pin over (the one for the white light) and not use it.
It helps to have a 5 pin extension cable and bend THAT pin on the cable so you don't have to bend a pin on the header.
sir your answer helped alot but i wanted to ask (since im a starter) that i have the cable of rgb which is female, meaning that it has to be inserted 4 pins, but my mobo has 5 pin rgbw header (is has 5 pins not 4), so can i just put the cable to the first 4 pins and leave the last one as it is on mobo? thanks alot