Prot16 syntax themes

Colour schemes for highlighting code syntax

Prot16 is a collection of 16-colour-palette schemes. These consist of 8 base values, divided by two groups into 'light' and 'dark', plus 8 accent values which remain constant across light and dark instantiations. The idea is to easily transition from light to dark while retaining the same feel. The accents are variants of red, orange, yellow, green, cyan, blue, violet, and magenta.