A summary of each dye colour is provided below, with more detailed information availible by folowing the link to that dye colour.
Black is not a simple colour to obtain in [[period], especially early period - few things make true black dyes, and many black dyes are either not colourfast (fade quickly) or corrosive (eat through the fabric).
Contrary to popular misconception, good green colours were hard to produce. Dull brownish or yellowish greens are cheap, but a good nice green fabric might cost more than a blue fabric.
I am told, that in period the colour formed by mixing red and blue (eg overdying madder with woad) was considered to be brown, where in modern times we have a range of names for various shades: wine, maroon, etc.
Purple dyes were much prized (and hence expensive) as few sources of purple were availible. Range from redish purples to non-colourfast mauves and magenta colours.
Dark/dense reds were for the richer people (or at least the more expensive clothes of the poor), while pink (last from the dyepot) was a colour for cheaper fabrics (mostly).
Lots of dyes make period yellows, not all of them were very colourfast, but even colourfast varieties grew well. A fairly cheap colour to produce.