Alternative replacement thread colors to use
DMC don’t often release new colors but the batch that they released in 2013 still seems to be difficult to find in stores (and, confusingly, is often still labelled as “new”). I have only managed to find them as a pack online at 123 stitch and also directly from DMC via their website, and they are not available at all in Europe/UK I think possibly due to EU regulations because of the dyes used.
See this great comparison of the new colors and how they fit into the DMC palette range.
Here are the closest 1:1 matches. Although they should be good substitutes if you already have the pattern, it’s better to have a pattern created with the palette incorporated - it could mean different colors may be used in the context of the image:
DMC confirmed the above colors were officially discontinued and they have provided an alternative list of replacements which make use of the new 01-35 colors released in 2017:
Also DMC occasionally discontinue colors altogether. Here is a list of discontinued numbers and the colors they can be replaced with should you have an older chart that uses them: