Pink Blue Wave? Pinkish blue? Pink and blue? No, it's blue wave in pink. Layered concentric circle design is called blue wave and this design shown is modified the circles to pointed peaks but still called blue wave design, hence blue wave in pink. Blue wave (regardless of the colour) is one of the oldest and most traditional design and you can still see it everywhere in Japan, well, not everywhere but very popular especially where kimono is concerned.
This design looks like fish scales, doesn't it? However, there is actually a design called scales (another old and traditional one) and I will show you next Saturday, of course in pink.