An orange spark is normal, regardless of what you're being told. The only way to get that hot blue spark everybody is talking about is to go back to wire-conductor plug wires, and those are as scarce as a chicken with lips these days. If you've got resistance "wires" made of string and graphite powder like 99.9% of all wires are these days, the spark will be yellow/orange. It still does an excellent job of igniting fuel- - - -the only thing it won't do is make your neighbor's TV set do weird things due to the electromagnetic signal real wire ignition cables emit. Radio/TV suppression cable has been in general use for over 50 years and yellow sparks have burned untold millions of gallons of gasoline efficiently.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!