IRO | 色

Meaning: Sexy
Reading: iro [いろ]

Needless to say, it represents the "color" that we see. Originally, this kanji referred to sexual desire, as in "amorous" or "sexy". It is said that the reason why "complexion" and "makeover" refer to a person's appearance is because appearance is important in sexual relationships, or because sexual exuberance appears on the outside.