The shoe is black; the dots are white or silver. A friend of mine is partner in an online shop called www.thepolkadotlife.net. You can find lots of tempting things there... But this shoe was something I found on my own. And according to wikipedia, there is also no direct connection between polka, the dance, and polka, the dot.
Yayoi Kusama makes art with polka dots. The friend with the online shop works in a museum where Yayoi Kusama's work is on exhibit. There is no direct connection there, either. This entry is beginning to veer toward its own kind of dottiness. Pixilation rather than pixelation. (Instead of reading between the lines this weekend, I encourage you to go out and read between the dots.)