some versions of Color 1 seem to be stuck when saving
actually Color is not stuck, it's 'only' trying to compress the whole 'Documents/Color Documents' folder, which can be very long if there are render files in it
it's a Color bug, which calls badly the shell command 'tar'
there are 3 solutions :
when Color is stuck on saving, open the terminal and enter the command 'killall gzip' (without the '')