Very simple idea. This either changes the text colour , or the text and background colour of your text.

Just load this into your ALIASES section (Alt+r).

type "/clr text" to change the colour of the text randomly
or
type "/clr2 text" to change the colour of the text and background colour randomly

note that /clr may show some text the same colour as you background so will only be visible if you highlight it.

I thought i might aswell update this code to only a few lines long.
This doesnt do numbers though.

clr {
  var %nintext $len($1-) + 1, %clr1 1
  while (%clr1 < %nintext) { if ($mid($1-,%clr1,1) != $chr(32)) { var %msgclr %msgclr $+ $replace($mid($1-,%clr1,1),$mid($1-,%clr1,1),$+(,$r(0,15),$mid($1-,%clr1,1))) } | else var %msgclr %msgclr $chr(32) | inc %clr1 }
  say %msgclr
}

clr2 {
  var %nintext $len($1-) + 1, %clr1 1
  while (%clr1 < %nintext) { if ($mid($1-,%clr1,1) != $chr(32)) { var %msgclr %msgclr $+ $replace($mid($1-,%clr1,1),$mid($1-,%clr1,1),$+(,$r(0,15),$chr(44),$r(0,15),$mid($1-,%clr1,1))) } | else var %msgclr %msgclr $chr(32) | inc %clr1 }
  say %msgclr
}