Hi @mstotts ,
Do you mean that your custom form of sharepoint document can not update successfully?
I've made a similar test and found that you need to pay attention to these two points:
1)Only the checked out items could be edited

2)you need to click "edit all" after you choose "properties" to edit the record.


If you do not pay attention to these two points, you will not update successfully.
If the problem still exists, please show me your settings of your custom form, including datacards,controls,form,ect.
Also, I need to know the fields' data type.
To sum up, changing form's background color will not lead to form not updating successfully.
This should be the problem of form's settings or the two points above.
Best regards,