Possibility to change white background behind question of single question form?

Hey,
I'm trying to custom my form. However I can't find an option to change the background color of the containers on single question form.

Want to change the background to something more transparent. I see that this is possible for them welcome and thank you part of the form, but can't find it for the questions.

Is it possible to do this? or perhaps inject custom css by which we can achieve the same effect?

It is not possible and it is likely not going to be implemented. The design options of our card forms are centralized and limited. You also cannot add a custom CSS in it.