Sparcs,
I hesitated about replying. I have seen a lot of the help you provide so I want you to know this is not a pissing contest. See my comment below about colors.
Pardon my copying this from dbstalk. (am i able to use the dtalk word?)
/plagiarism on
You really can't change the performance without making them physically different, and then they wouldn't fit the coax, "or" would have an air dielectric.In early 2003, the Consumer Electronics Association established standard CEA-897 for color coding of F connectors. At the time, it was hailed as a breakthrough for satellite TV users as a way of insuring the suitability of connectors for various purposes and identifying which cable goes where.
http://www.appliancemagazine.com/news.php?article=4229&zone=0&first=1
From a 2005 Echostar hardware specification guide:7.3.1 F Connectors
The connectors must be color coded for satellite signals, in accordance with CEA-897.
The F connector must withstand a minimum of 75 lb-in of applied rotational torque before any mechanical movement and/or degradation to the RF and DC performance is allowed. If the vendor chooses to use cast F connectors in the mechanical design, the dielectric must be able to withstand a 10lb pulling force.
The connectors must accept RG-6 cables. All RF and DC requirements must be met after 100 insertions of cables. Failure of the device to meet RF and DC requirements after insertion of cable will be considered a failure of the product.
All ports will be threaded 3/8-32 UNEF and free of thread damage.
The color of the dielectric should most certainly be meaningful but opinions aren't required to be influenced by the existence of standards.
/plagiarism off
Blue does mean something. Not all manufacturers follow CEA and won't pass QA by Dish. So they will have to go to bed without any pudding. Blue does tell Dish that the manufacturer read and followed the standards.
As the plagiarism says, the connector is so low tech, it is probably unimportant. I don't think a sine wave cares from blue or white or yeller. But Dish does.
Peace to you.