You can use conditional formatting to specify a different fill color for the background and you can also change the color and/or style of the text in the field as well.
tagging on to this
How would you do that based on a related field.
A conditional format expression can reference related field as well as fields in the layout's table.
For example, could be used to Specify a Field be formatted differently if a related record is missing.
Thank you. I figured there was something and it worked.