Hello, In a survey I build in a form like the below screenshot: ! On the field Zipcode I added a validation on Postalcode. If a wrong code is given, a message appears. But I also want to have a different background-color. How can I set this background-color to a bit of red? Thanks in advance.

@Nico_Leussink ;jQuery("[id='QR~"+this.questionId+"~4'] ").css({"background-color":"red"});

Do you want to set it permanently red or become red only on wrong entry.