Colour in Japanese is 色 (いろ) and using colours works a little different in Japanese than in English. In English, you can use all colours in the same way. One option is putting it in front of a word to say something about it. If you want to say which colour the car is, you just put the colour in front of it, and you get a green, red, pink or even deep turquoise car. In every case, the colour can simply precede the noun (the car in this instance).
In Japanese, there is only a small group of colours that can be used as adjectives in this way, although this is an important group. Most colours are used as nouns and take the possessive の when it precedes another noun. The colours that can be used as adjective are い-adjectives and conjugate in the same way as other い-adjectives
Main lesson 1: Most Japanese colours are used as nouns and take the possessive の but a small important group can be used as い-adjective
Standard way to use colours in Japanese
First, let’s look at some ways how to use colours in Japanese. Below, we will go into the two different colour groups in more detail.
顔が赤いです
かお が あかい です
Your face is red
顔
かお
Face
赤い
あかい
Red
です
Is
あの灰色のビルですか
あのはいいろのびるですか
Is that a gray building?
あの
That…
灰色
はいいろ
Gray
ビル
びる
Building
です
Is
か
Question particle
紫のじゅうたんはこの赤いカーテンと調和しないだろう
むらさきのじゅうたんはこのあかいカーテンとちょうわしないだろう
A purple carpet will not go with this red curtain
紫
むらさき
Purple
じゅうたん
Carpet
この
This
赤い
あかい
Red
カーテン
kaaten
Curtain
調和しない
ちょうわ
To not be in harmony
だろう
Probably
Colours as い-adjective
So there are a handfull of colours that function as い-adjectives. You probably already know how い-adjectives work in Japanese. If not, check this article out. The concept for colours is more or less the same. The colours start out as simple nouns as you see them below but when you use it as an adjective you add an い.
い-adjective colours (in noun form)
Black
(くろ)
黒
White
(しろ)
白
Red
(あか)
赤
Blue/green/azure
(あお)
青
Yellow
(きいろ)
黄色
い-adjectives colours as adjectives
Black
(くろい)
黒い
White
(しろい)
白い
Red
(あかい)
赤い
Blue/green/azure
(あおい)
青い
Yellow
(きいろい)
黄色い
これは赤い車です
これはあかいくるまです
This is a red car
これ
This
車
くるま
Car
です
Is
父は白い紙です
ちちはしろいかみです
My father has white hair
父
ちち
(My) father
白い
しろい
White
紙
かみ
Hair
彼女は小さな黒い犬を飼っている
このじょはちいさなくろいいぬをかっている
Girlfriend has a small black dog
彼女
かのじょ
She/girlfriend
小さな
ちいさな
Small
黒い
くろい
Black
犬
いぬ
Dog
飼う
かう
Owning (a pet)
赤いドレスのため彼女は目立った
あかいどれすのためかのじょはめだった
A red dress made her stand out
赤い
あかい
Red
ドレス
doresu
Dress
彼女
かのじょ
She/Girlfriend
目立つ
めだつ
To stand out
Japanese Colours as nouns
Most Japanese colours are nouns which means that when you want to use them as adjective you have to use a の to connect it with the noun you want to say something about. First a short list of this group of colours and then some examples.