I'm wondering why you didn't just buy more of the same gold paint you used on the helmet? If that was your intent when looking at the lid, keep in mind that lids can be swapped out by kids or pranksters in the store (like the people who remove tubes of hardener from cans of resin and filler in the store) so always trust in the color name printed on the can itself (which cannot be fooled with in the store). The color of the cap usually isn't a precise exact match of the paint anyway. Take for example the metallic mirrored chrome caps on some paint - as hard as you might try, you're not ever going to get the same reflective mirrored look from the actual paint.
Your build is coming along awesomely!