Analysis of information sources in references of the Wikipedia article "Red–black tree" in English language version.
A lot of people ask why did we use the name red–black. Well, we invented this data structure, this way of looking at balanced trees, at Xerox PARC that was the home of the personal computer and many other innovations that we live with today entering[sic] graphic user interfaces, Ethernet and object-oriented programmings[sic] and many other things. But one of the things that was invented there was laser printing and we were very excited to have nearby color laser printer that could print things out in color and out of the colors the red looked the best. So, that's why we picked the color red to distinguish red links, the types of links, in three nodes. So, that's an answer to the question for people that have been asking.
Our parallel algorithm for constructing a red–black tree from a sorted list of items runs in time with processors on the CRCW PRAM and runs in time with processors on the EREW PRAM.