Yellow pilot flame

[Plumber69]

This is regarding a gas fireplace, but should be same idea as furnace. I put a new gas valve in, new pilot assembly and new orfice. All bought from manufacturer. Pilot is yellow, if I turn down pilot, its just a smaller yellow. I can't seem to get a strong blue flame. If I turn it up i get a big yellow flame. Am I supposed to turn it way up?

 

[Fitter30]

Check model of pilot assembly see if the orfice is sized for the gas your using

 

[Sponsor]

 

[Plumber69]

Check model of pilot assembly see if the orfice is sized for the gas your using

What would make it a blue flame? smaller orfice?