赤い
あかい(red)
How to make colors nouns?
When colors have the い at the end it means that they are an adjective, but if you drop it, it becomes a noun
青い
あおい(blue)
白い
しろい(white)
黒
くろ(black)
オレンジ
Orange
グレー
Gray
ピンク
Pink
紫の
むらさきの(purple)
黄色
きいろ(yellow)
緑
みどり(green)