... your arguments are not even internally consistent! if "gigabyte blue" is different to "company X blue" then its not the BLUE the matters its the GIGABYTE part that does.
Certain companies use higher grade components (although beware the bait and switch), but color is not related to it.
Gigabyte supposedly uses double thickness copper layer in their PCBs for better thermals... I honestly don't know if it does ANYTHING at all. But they claim it does

. They also typically use higher end capacitors and well designed boards. They are a good company to buy from, but the color of the board they chose is irrelevant.