Honestly? I wouldn't worry about it, Prissi. :3 Considering it's the actual trim used in the real Myu costumes, I think a slight discrepancy in color between the trim and the skirt is more than acceptable. Believe me, once that stuff is on, it'll sparkle so beautifully you won't even notice!
I actually had to make due with very slightly different colored gold trims because of what I used on most of my Myu Saturn simply not being available when it came time to do maintenance. I ended up using the slightly different trim in the glove bands and bows, since I figured that would be most consistent and least likely to be noticed. Can you notice any difference?
XD So yeah, the upside of the bling is slight variations are hardly noticeable!