I have a problem with conditionalStyle in iReport. I have the following textFields (${nameField} = field value):
${field1}=30  
Your question is not clear, can you be more explicit ?
From my understanding , each value will mean a specific background for a textfield, in that case your conditional style value should depend on variable. Maybe using Variables in your style can suit your need.
Add multiple conditional style under each style as below:
each textField can now have different background :