Why would a letter care to rmrmber redness? This is the old way.
I am thinking more of a red tinted-glass filter that word puts up when it's misspelled. So the letters can draw themselves any way they please, and the user would still see a cue.
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We have only 2 things to worry about: That things will never get back to normal, and that they already have.
Well, objects could be told to accumulate and fuse, and then the whole thing can be told to be red. In fact the property of color need not even exist at the letter level, any more than a typeface does; only in specific representations does it have meaning.