朧 (Oboro)

From BoardGameGeek:

All white cards are vaguely colored in the hand. If you withdraw from a trick, your hand becomes even weaker. It's like water slipping through your fingers. Treat yourself like that. Oboro is a trick-taking game with cards from 1 to 28, suitless and players don't rearrange their hand. You may have color cards in your hand; if so, all cards to the right of it (until the end of your hand or another color card) are that suit. Players bid for tricks and must follow color. You may later play the color indicator cards from your hand, thus changing the color of things in your hand.