Basically what you do is change the color codes inside the style sheet. I used Visibone's color wheel to pick colors. You copy and paste the numbers of the colors you like into the css style sheet of your journal.
http://www.visibone.com/colorlab/On your control panel, under "Journal Skin" select "Create or edit custom skin." Look the code over until you are familiar with the basic structure -- top, left column, middle column, right column, bottom. Once you can separate those segments out in your head, you can start to see where the colors are.
For example, one might be: background-color: #999966;
Carefully paste the new color number you've selected over the old one -- (do not exclude things like # and ; and } -- this punctuation is holding everything together, so be very careful about not deleting any by mistake).
Chances are the first few times you will end up with the color changed in the wrong place. It's a good idea to paste the original color number onto a sticky just in case, so you can paste it back if it turns out not to be what you thought would happen.
I suggest you start with:
/* JOURNAL BODY */
body {
background-color: #CCCC99;
font-family: Courier New;
font-size: 14px;
font-weight: bold;
color: #000000;
margin: 0px;
padding: 0px;
}
and change the two colors in that code a few times so you see what happens before you go deeper down.
If you really screw it up, don't worry, you can always go back and reselect the ready-made skin to put you back where you started.