How can I change the Name sub labels font size and color?

I built an event reservation form and want to change the sub label font size of the Name field only. I tried from the Design but it takes other fields sub labels.

This is the form: https://form.jotform.co/62558679609878.

You can inject the custom CSS code below to change the sub-label font size and color of the Name field. Simply replace the highlighted text with the values that you prefer.

#sublabel_first, #sublabel_last {

    font-size: 13px;

    color: blue;

}

Here's how it should look after:

Please let us know if you need further assistance.
Regards.