Sheila, the Software of our Forum allows for different colors..... BUT the settings are mighty "sensitive"... and sometimes all you have to do is backspace, or something else as simple...and the setting is GONE, and must be reset.
To set your font to stay on the Forum, Click on Tools; Internet Options; Font; Highlight the Font you wish to use and click OK. Click OK again in last "box" opened. I use Comic Sans...and my entire website "reads" in Comic Sans, and when I type to post-- it's Comic Sans, but I have to change the color.
I think there is a way to set the whole website in colors. Click on Tools, Internet Options, Colors and in the little box that pops up...click on How to ignore preset colors. Internet Help comes up with instructions for you. I've not done that...as don't want to have all posts the same color on my screen. So--- that's as far as I can lead you. 
I find playing with the computer entertaining... and am always experimenting with it.
I left chat early last night, so I'm not one of the ones who ducked out on you! Hahahaha!!
Enjoy the day!
Joella