The yarns in stock vary and only a few of each are produced at a time. they are different each time but main colourways can be selected. If you buy it and don't like it just send it back. I think you will though...

Sock knitting kit.  £8.50  includes yarn and instructions.  rainbow dyed colours in 'rainbow of reds, blues & yellows, shades of red, blue & purple, greens.   Note that due to the process involved there will always be some other colours in there.  That is all part of the fun.