赤い (akai) means “red” | MotiTan Japanese Dictionary

More examples

赤い風船が好きです。aka i fū sen ga su ki de su

I like red balloons.

彼女は赤い靴を履いています。kano jo wa aka i kutsu o ha i te i ma su

She is wearing red shoes.

Indicates that a surface has the hue recognized as red, whether bright or dark.

赤色を帯びた色であるさま。aka iro o o bi ta iro de a ru sa ma

赤い (akai) is a native Japanese adjective formed from 赤 (aka, "red") and the adjective ending い (i).

In Japanese traffic language, 赤い (akai) describes the color of a signal, while 赤信号 (akashingō) names a red traffic light.