How to remove the hovering style from the front-end post adding form?

In order to remove the hovering effect from the fields in the "Submit Article" layout you will have to edit the file \components\com_rsblog\assets\css\style.css. Here, around line 123, you will find the following styles:

table.rse_add tbody tr.row1:hover  { 
      background-color: #FFFFA8 ;
    }

which you will have to delete. After this, the hovering effect will be removed.