Is the colorspace R package part of the Tidyverse? Looking at this list of Tidyverse included packages it appears the answer is "No".
However, when I load the tidyverse via library(tidyverse) it appears that colorspace is loaded. I can request help with ?colorspace_function() and the functions appear in my R Studio help window. If I start a new session of R, don't load any packages and run ?colorspace_function() I get a "no method" error, as expected, indicating the package containing this function isn't loaded.