In a moment of "My god, I can't believe I forgot that!" I've added the ability to edit the color behind posts -- making it so you can adjust ALL the colors (well, except the menu box on the right -- and I'll get to that when I get back from out of town). So you now have more control over your color scheme.
Okay, the solution is as follows: <font color="000000">Text you want to be a different color</font> Where the "000000" is the color code you want to make the text (same as the codes you use on the layout). You can also use certain color names like "Blue" or "Red" or "Navy" (I forget the whole list of words that work).
Other options that work within the <font> tag are Size (size=+1, size=-2, etc) and Face (face="courier new" , face="Times New Roman", etc).