That statement by Wittgenstein is far from being the same thing as the Sapir-Whorf hypothesis. For one thing, if you can discriminate colors then you can name the colors, if you want. That is, the limits of your language include being able to talk about those colors, assuming you can discriminate between them. In any case, it's jumping to probably mistaken conclusion to interpret "limits" of language and "limits" of the world that Wittgenstein was talking about as being about same thing as Sapir-Whorf hypothesis concerns.