Custom colors for text and background for messages

Greetings!

On both my old 520 and now my new 830, I get pop-up messages which are essentially useless!  (These are both personal text messages and device-generated messages.)  They are dark gray on a black background.  For me, they are impossible to read.  Worse, they cover several data fields, so I have to clear the message I can't read.

Is there a way to change the text color to white-on-black, black on white or yellow, etc?  I have been putting up with this annoyance for a couple of years now, and I was hoping the 830 would let me change this.  Apparently, NOPE!