"Caterpillar" Yellow ?? - Model Railroader Magazine

I'm preparing two tracked side boom cranes for use at my SP&S Vancouver Car Repair facility.  Will employ dozers and side crane/winch attachments from Custom Finishing.  My paint locker is depleted and I'd like to stock up on the best match for the rich "yellow" that Caterpillar uses on its equipment. Can someone point me in the right direction?