"Colorado high court to hear case against Christian baker who refused to make LGBTQ-themed cake" by Colleen Slevin and Jesse Bedayn for Associated Press
https://apnews.com/article/colorado-baker-lbgtq-cakes-court-case-346930f66dbf451b84c0d72c5c7c2cc5
Specifically, someone ordered a pink cake with blue frosting (and no writing) to celebrate gender transition. This case is going to be interesting to watch. Personally I don't think this should be considered speech, assuming that the baker provides options for cake and frosting colors as a normal part of doing business.