Amanda's real hair color is defo not red, I think, it's probably brownish. But as for VP's natural hair color, well I guess we can say it's red, but I don't really know =/
I take it you're talking about Amanda Righetti who plays Grace-I Believe her real hair color is blonde..unless 당신 mean her character 봉고차, 반 Pelt-which her hair color is probably meant to be naturally red..if that's what 당신 mean.
