No, I’m sorry, currently that is not a feature of the stack. It is something I’ll keep in mind for a future update though.
This too is not a feature of the stack. Sorry. In a future update I do have pre-defined subjects planned as a feature, but not one that is built using a drop down Select element.
@kah, if you’re okay with adding a bit of CSS, you can do this.
Paste the following into the CSS section of the HTML tab in the page inspector. I have the form field background separate from the icon areas, in case you want to do something a bit different with one. Change the hex code to the color you want.
// Change Form Field background colors
.form-control {
background-color: #E6E6E6;
}
//Change Form Field Icon area background colors
.input-group-addon {
background-color: #E6E6E6;
}