Document containing different text colours?

[Sharon Kimble]

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In a book that I am writing, the text is white on black background which
I like. But this is only the first draft, when its ready I shall go onto
the second draft and then third draft, as many as necessary to polish
the book before it goes to the beta-readers.

So the first draft is white text on a black background, is it possible
for all the second draft text to be in a different colour that I assign
to it? And ditto third draft onwards?

I envisage something like setting the text with 'M-x second-draft-text'
which will then display the new text with its assigned colour. Which
will also mean that the document will have multi-coloured text in it?

Is this possible?      

And if it is possible, how do I do it please?

Thanks
  Sharon.  
- -- 
Debian 10.2, fluxbox 1.3.7, emacs 27.1, org 9.3.7
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