(I designed a nested version of the Tractatus if you're interested: http://tractatuslogico-philosophicus.com/)
it says somewhere "thought it need not be red"; should be "though".
Proposition 4.022 should be called 4.002, according to my edition and another edition on the web I checked.
Perhaps the Gutenberg edition you used is not as properly proofread as one would hope.
Mentioning the source on the site is probably a good idea, for those not inclined to open up the source and hunt for it.