Is this at all possible?

[ThistleProse]

Hello!

I am looking at being able to let users stylise their profile pages by inputting HEX codes and image URLs into custom profile fields.

If they don't want to enter anything, though, I was hoping it would fill in as a preset default colour and image, which would be set in the coding.

My original idea was it input 'default' into the fields to use a default setting that would be assigned, and if they input their own setting (eg, 000000 for a Hex Code) it would insert that.

But I'm not sure how to have it differentiate between the inputs? Or is there some way to do 'if field is filled in, use that code. Else, if its empty, pull this default code'?

Any assistance would be amazing. I'm very much learning as I go here, so I appreciate your time!

Thank you!