Not affiliated with Canon Computer Systems Inc., makers of the BJC family of color printers.
Copy this bjc620b1.upp file to /usr/share/ghostscript/5.10. Save your document or image in Postscript format, and do:
(as root) chmod 666 /dev/lp0 (as user) gs @bjc620b1.upp -sOutputFile=/dev/lp0 document.ps -c quit
Gernot Zander preferred a different color balance. You might want to try his .upp file instead.