Your colour is blue today. Do you want to wear something blue today?
Blue is your theme colour for today so shouldn't you wear some blue clothes?
ーYour colour is blue today. Do you want to wear something blue today?
「今日のあなたの色は青ですね。青色の洋服を着たいですか？」
ー Blue is your theme colour for today so shouldn't you wear some blue clothes?
「青は今日のあなたのテーマの色だから、青色の洋服を着るべきじゃないかしら？」
「今日のテーマは青」のように今日のテーマ、今日の〇〇という言い方は
Your xxx is ... today
XXX is your theme ... for today
と言ってみると良いでしょう。
ご参考まで！
カナダ 
