Where can I find specific dye colors?
Bad puns aside (of which the title is a very bad one), whereabouts do you acquire dye from?
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Many merchants will sell dyes. I know that as soon as you reach Act 2, there is a merchant who has a variety of dyes for sale, but I found some merchants in Act 1 who also sold them.
Of course, if you have the Collector's edition, you should also have access to the special dyes that were part of that package.