Thank you all for your comments and votes supporting this suggestion. We are now in the planning stages to support Rich text editing in Excel for the web.
An error occurred while saving the commentAnonymous commented
Hey after reading the comments below I now know that Google Drive will work. Not sure why I am paying so much for office365 if there is another option that will have the basic functionality of being able to use multiple font colors in the same cell. If I learned nothing more today I learned that at least google is an option. Let me know if this actually gets taken care of. Until then G-suite here we come.