> This page has simulations of colored bar papers which are not meant to mislead you into thinking they are real images. They are just here to illustrate what real colored bar papers would look like in various different colors.
Well... if your monitor is calibrated to show real print colours... or whatever the proper term is for that. Obviously my monitor isn't.
All the fanfold green-barred paper I used had the green as a pinstripe, so it's hard to say which is closest, but I think it was probably either the #BB.. or #CC 'green's BUT perceived like the #A9 green because of the pinstripe effect.
Might be used as a text editor feature, to offer line oriented rather than structural emphasis. Not sure it’s a winner, but it makes for an interesting thought experiment.
Without any sort of additional information this seems like just random assortment of colors author happened to like. This sort of article would be much more valuable if it had information how the specific color values were produced.