レッドreddo

1. no-adjectivered

• Synonym赤あかNeutralThe everyday native word for red (「赤い花」); it also covers communists and deficits (「赤字」). 「レッド」 turns up mostly in fashion, brand and sports terms.
• Synonym朱あけNeutralLike 「レッド」 it can mean red, but 「赤」 is the everyday choice; 「レッド」 itself leans toward loanword colour names such as 「ワインレッド」.
• Synonym赤色あかいろNeutralNames the colour red (「赤色に塗る」); more formal than 「赤」 and typical in colour description, it can also refer to communism.
• Synonym丹色にいろWrittenA traditional Japanese colour name for deep reds like vermilion, seen in classical writing; 「レッド」 is a general loanword colour name.

For everyday talk about red, use 「赤」; 「レッド」 appears mostly in loanword compounds like 「レッドカード」 and 「ワインレッド」. For formal colour description pick 「赤色」, and for traditional colour names 「丹色」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 赤色あかいろ。