You would think that me being a web-developer/software-engineer since circa 2001, I might have been aware of this sad story/nice tribute, but I wasn’t… (but then I avoid Twitter at all costs)
The thing about this colour though is, in Hex it is
#663399 BUT in my module RGB is defined from
1.0, so it becomes
0.4, 0.2, 0.6
Out of all the colours above, RebeccaPurple is the only one that ends up with RGB all being a single digit decimal.
…I just thought that was nice, it is a special colour