Web Open Font Format

Here's a way to get it worse: create a family of fonts, say, "sans-a", "sans-b", ..., "sans-z", "sans-space" and whatever. In each such font all the glyphs will look the same as the character in the name of the font. I guess that this should get compressed rather well.

Now all you need to do is apply the required @font-face attribute to each letter. And thus you write:

white

but the reader will see it as:

black