Change textarea component display...can it be done from code?

I need to change the default “layout” for the textarea component. Normally, the textarea component has a white background and also displays a blue border when you go to edit it. I need to remove these things and have the background color removed and also remove the border. I can do that by changing the skin from Component_Assets but that would mean that all the textareas that would be used from now on in my project would be the same. Can this “customization” be done from code in order to leave the skins unchanged? Thanks a lot in advance.