Pin it Pin on Pinterest This Treble Clef is a custom deck of blue playing cards inspired by classical music. Treble Clef Playing Cards is functional, and all 52 cards are fully marked with suits and values. If you are a magician, then you would be able to find your spectator’s card without seeing the face of the card. This deck is elegant and well-designed. On the back, it is filled with luxurious, white-detailed line art with classy, blue-colored background. The symmetry treble clef logo in the middle is absolutely stunning. On the face, the instrument players and the conductor exude feelings of an orchestra.