How can I change color for the question fields in my form?

The default white background of your question box can only be changed using custom CSS (Please note that this feature is exclusively available with specific pricing plans). You can remove this background altogether though, no matter which plan you're on.

To remove question backgrounds, go to Theme & Appearance → UI Elements → Questions and toggle off "Questions have background box and shadow"

The toggle "Has background and shadow," as it appears in the menu under Theme > UI Elements > Questions

Selected Answers

The boxes of selected answers (e.g. for Multiple Choice or Product questions) are governed by the Active Color. Both the color and transparency can be customized to whatever you'd like under Active Color in the Theme & Appearance Settings in the Question Panel.

The "Active Color" setting as it appears in the menu under Theme > Theme Settings

Answer Text

The font color for typed answers matches the Active Color by default. If you would like to change this text to be a different color, you can change it under Theme & Appearance → Typography → Answers.

The menu shown under Theme → Typography → Answers with the "Color" setting highlighted on the right side of the other font settings.