I’m so glad to see you setting up a shrimp tank! Shrimp are wonderful to watch and so much fun.
I did, however, want to warn you about mixing different color strains of neocaridina (cherry and blue velvet). Most experienced shrimp keepers would offer you the same advice: if you mix colors, you more than likely will end up with brown offspring. Because all of the different color strains are derived from the brown “wild type” neos, crossbreeding has a tendency to throw wild types and not the lovely colorful shrimp you enjoy. If you’re lucky enough not to get all brown, you’ll get some randomly colored babies and possibly a few of the original color. Generally, if you wish to preserve the color and integrity of a strain, it’s best to keep them separate from other neos to prevent crossbreeding.
I would suggest picking one strain you like the best, or asking for all males of each color. Having all males prevents crossbreeding, and you get to keep all the colors you’d like, but the only downside is that with no breeding occuring you will have to replace them once they pass away.
Additionally, as Kashif mentioned, the fish may eat the baby shrimp. I am sure that fish that small will leave adults alone, but if you are hoping for a breeding colony, be aware that even corydoras will suck up a shrimplet if they come across one. I’d suggest adding more cover for the baby shrimp to hide in to help them have a higher survival rate. Breeding colonies can be done in tanks with other fish, so long as some of the babies have a chance to survive to adulthood.
I hope this helped, let me know if you have any other questions.