[NTG-context] Transparency without colors.

Hello! In my "simplesteps" module, I'd like to adjust the transparency of the foreground color. The file tex/context/base/colo-ini.mkiv suggests that there is a way to do that: % Currently in mkiv transparency is implemented independent of color. This costs % a bit more processing time but gives the possibility to apply transparency % independently in the future. Is this useful? If not we may as well combine them % again in the future. By coupling we are downward compatible. When we decouple we [...] How can I define the transparency of some text? André Caldas.