yes，i have the same problem

I think it has to do with the smithing skill, like if your smiths lvl is to low for the specific grade the color would change to a lower version. Same goes for no lighting and other negative modifiers that contribute to crafting.

Due to FCS (Kenshi's modding tool) limitations, there's no option to assign certain item to certain grade as easy as it should be. Kenshi has hardcoded 5 tiers of items and calculates on it's own how item should be tiered. With changes to balance I've made, weapons got automatically assigned to wrong grades and there's not much I can do about it.

The best solution I've come so far with, is to remove Blue grade, and then Edge Type 1-3 and Meitou would have the correct colouring. I don't know if people will be satisfied with that but I decided to release an update. We'll see how it goes.