A baby blue pocket square is almost as versatile as a white one. Light blue tints could be considered a menswear neutral, when it comes to shirts, ties, bow ties and hankies. Works with almost anything, and especially well with a navy blazer and a pink bow tie in tonal paisley.
Have no previous experience with pocket squares but this seemed to be quite stiff and took several attempts at folding and safety pins to correctly shape into a 3 stair fold. Conversely some stiffness is probably good for holding shape.