I wonder whether is it possible to define custom color shortcuts in MATLAB.

It is possible to use `r` instead of specifying `[1,0,0]` in MATLAB? Similarly, is it possible to define another shortcut?

For example, I would like to define,

`[0.9047,0.1918,0.1988]` as `rr`  

`[0.2941,0.5447,0.7494]` as `bb` etc