Keep in mind for a black/white themed build there are plenty of black graphics cards you can choose.
As for white, there is a single white card that matches your request (580/1070 or higher)
https://www.newegg.com/Product/Product.aspx?Item=N82E16814126119&ignorebbr=1&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=