赤い

esp. 紅い for scarlet, 朱い for vermilion

She was wearing a red skirt.

家では赤味がかった髪とそばかすのせいで、母が侮蔑を込めて「にんじん」と名付け、皆にもそう呼ばせています。

At home, because of his reddish hair and freckles, his mother scornfully named him "carrot" and had everybody else call him that.

白ワインと赤ワイン、どちらになさいますか。

Would you like white wine or red?