one color; single color
Often used after a color word, as in 白一色 or 黒一色, to say that something is entirely that one color.
The decorations at the venue were unified in all white.
The screen suddenly turned entirely blue.
all one kind; dominated by one thing; filled with one mood or topic
Extends from 'one color' to situations where a place, selection, conversation, or atmosphere is overwhelmingly one type, tendency, topic, or mood. Common in patterns like クリスマス一色, 選挙一色, and 祝賀ムード一色.
The shelves were filled entirely with imported wine.
The town is completely in the Christmas spirit.
The news became dominated entirely by the election.
This wall is painted entirely white.
The town became completely swept up in Christmas mood.
Many people were fed up seeing the Diet consumed entirely by election talk.