Keep in mind that story covers look best when they are kept simple! You want your highlights to add to your profile rather than taking away from it by clashing or being too distracting.
In my personal experience, I’ve found that two to three colours work best and ideally, choosing at least one that is dominant within your Instagram image posts (in my case, white) is most aesthetically pleasing.
Highlight names should also be kept simple. Think, one or two words max!
And in my personal opinion, text should be avoided in your highlight covers.
Consider the fact that the vast majority of those viewing your profile are probably doing so on a mobile device. So, how legible, if at all, will your highlight cover really be?
Plus, you have the option to use a title just below it!
To create a new Highlight, click the + Highlight icon just underneath your Instagram bio.