Answer: The Gemara (Bava Basra 97b) teaches that one cannot use white wine as only red wine is considered to be proper wine. There is a machlokes among the rishonim however, as to what this applies to. According to Ramban, this includes both wine which is poured over the mizbeiach as well as wine used for kiddush. Rashbam maintains, however, that it only refers to the wine on the mizbeiach, and there would be no issue in using white wine for kiddush (See Nimukei Yosef).
The Shulchan Aruch (OC 272:4) quotes the Ramban and writes that while he doesn’t allow using white wine for kiddush¸ one may for havdala. Nonetheless, he writes that the minhag is to allow using white wine even for kiddush.
R’ Akiva Eiger (OC 272:4) writes that as one may use chamar medina, national beverages, for the daytime kiddush (See Shulchan Aruch OC 272:9), even the Ramban would agree that one could use such wines then (See Biur Hagra OC 272:4). Following this, the Mishnah Berura (272:10) writes that while all agree that it is preferable to use red wine for kiddush, one may use white wine lechatchila, particularly if it is better quality.
Regardless, R’ Yehoshua Neuwirth (Shemiras Shabbos Kehilchasa 47:n89) writes that if one added a little red wine to white wine, it would be considered red.
In conclusion, it is preferable to use red wine for Friday night kiddush when one has a choice, unless the white wine is superior to the red wine.