一色
1
one color
夏の山では目に見えるものはすべて緑一色です。
The mountains are a lush green in summer.
2
one kind
街はクリスマスムード一色・・・もうじきイブだ。
The streets are in full Christmas mood - it's almost Christmas Eve.
3
one tendency;being the sole mood, sentiment, focus of attention, etc.