It looks like the background is normally set to "none" and that allows the text to show up. If you play with the z-index of it, then it shows up but it stays. So, it looks like setting the background the way I set it isn't the way to do it if you want that other text to show up.
Try using class .beditor and adding it to the end of the css_b_editor.css template.
HTML Code:
.b-editor {
background: black;
color: red;
}
.b-editor__placeholder {color: red !important;}
I would strongly recommend learning to use firebug or a web developer tool to look at your CSS and figure some of this out yourself if you are going to get into styling.