I don't have a 1.16 workspace, but its a method that returns an int and has a line that looks like "return -16777216 | i << 16 | j << 8 | k;" (the "-16777216" part is just FF for alpha, already bit-shifted).
Alternatively, dig into where BlockColors gets referenced and how.
wow that worked! thanks! ill need to do some touching up. slowing down the speed of the climb, as well as requiring the player to looking in the direction of the wall before climbing.