How to change variable background color

[ESL]

I am using service portal to request adding business application record. After I request, it will send the record to approver and the record include variables in service catalog.

I would like to change the background of these variables if the value in variables match some condition.

I tried to use catalog client script such us [g_form.getControl('submitted').style.backgroundColor = 'blue';] script, but it does not work as expected.

How can I achieve these requirement?

Please advice, Thanks

[ESL]

Hi Dan 

Thanks for comment.

I have tried your code. It is not able to use g_form.getfield function.

And I also tried this code, it shows the 'backgroundColor is not defined' error.

[Dan O Connor]

Give me a few minutes until I try it on my instance, wrote that of the top of my head but might actually need a getElement

[Dan O Connor]

Sorry should also ask, where are you wanting the color change to appear?

In the catalog item request, or on the approval record? There is like a variable formatter that forms part of the approval record showing the variables passed from a request, and I'm not sure if you can apply styles to that formatter

[ESL]

I would like to see the color in the approval record.

Actually there are some hidden variables in the catalog item request, I will compare 2 variable value, if the value is not same, I would like to change the variable background color to let the approver know the value is different.