YOU SAID:

My father is wearing a dark red shirt

INTO JAPANESE

私の父は濃い赤のシャツを着ています

BACK INTO ENGLISH

My father is wearing a deep red shirt

INTO JAPANESE

私の父は真っ赤なシャツを着ています

BACK INTO ENGLISH

My father is wearing a red shirt

INTO JAPANESE

私の父は赤いシャツを着ています

BACK INTO ENGLISH

My father is wearing a red shirt