I need to remove the background colour behind the form

can you please also help me i need to remove the background colour behind the form (not the form grey colour, but behind the form which is dark grey colour) to  a clear and transparent colour..

In order to set your form's background to be transparent, please try injecting the following custom CSS into your form:

.supernova {
    background-color: transparent;
}

You can inject CSS into your form by following this guide:

https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes

Please let us know how it goes.