Problematic Error Messages in SharePoint 2013
Handling errors has never been a strong point in SharePoint even in the newest version. Let's take a look at some errors on required fields in a list.
There are several things to note about this:
The proximity of the error message to the field is too close. The Gestalt proximity rules would have us be more specific in its position. It would become a more obvious problem as the fields increased.
The error doesn't tell the user what should actually go in the field to fix the error. Now, when you put in a letter it does tell you that only numbers can go in it, but it should tell you that from the beginning.
The microcopy for the error doesn't have a positive tone. It sounds almost borderline accusatory.
When I do insert content into the fields it gives no instant feedback that I have resolved the error.
The input field with an error is not properly highlighted.
A subjective argument can be made that not only is the error message not have enough visual distinction, but that it also shouldn't use the color red.
If you want to see some good principles on error messages see the following posts.
How to Make Your Form Error Messages More Reassuring