How do I know what colour yarn or floss to buy?
The title page of each .doc file has a table with samples of all the colours used in that pattern. Use that page to select matching colours when you’re at the store. Use a good quality colour laser print for best colour matching, or you can bring a laptop to the store and use that to view and select colours. I stitch in the small needlepoint size that uses embroidery floss, and I find it easy to find the right colours by selecting from both (or either) DMC and Anchor brands of floss. Both brands are widely available online and in most stitching supply shops. They both offer a huge amount of colours.