If your Using UCS new Blades you might see a Purple when you have High CPU loads. Upgrade your ucs Code to 3.1.1K
https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2146388
http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/release/notes/CiscoUCSManager-RN-3-1.html