How to change the colors and form of labels in the form?

How do I change the font style, size, color of the Question Text?

How do I change the color of the lables, ie Email, Phone Number?

How do I change the font color of Email including Area Code Phone Number sublables?

How do I change the font style, size, color of the Question Text?

For font size, weight, color, you can paste the below CSS in your Custom CSS Field: 

.form-textarea,.form-textbox {

color: red !important;

font-weight: bold !important;

font-size: 15px;

}

You can adjust all parameters as needed right in the code.

How do I change the color of the labels, ie Email, Phone Number?

Regarding the color of the label, you can change it in Designer settings:

How do I change the font color of Email including Area Code Phone Number sub-labels?

The above will change all labels actually.

If that is what you had in mind?

Let us know if you have any further questions.

Thank you!