not sure about hex colors, but try to go with 20% light grey, the usual stuff
if you don't wanna go with the bland grey, I suggest black
if you don't want to go with that either, 40% light blue should also be good
oh and if you want it to be more spicy, put metallic to 100% and smoothness at 8%, I recently found about this out and my planes started looking less weird
If you want it to be really spicy, try adjusting the gray until there's a little more blue in it (like the color of the post-1.11 Wasp)
@ZeroWithSlashedO thanks bro for helping me
not sure about hex colors, but try to go with 20% light grey, the usual stuff
if you don't wanna go with the bland grey, I suggest black
if you don't want to go with that either, 40% light blue should also be good
oh and if you want it to be more spicy, put metallic to 100% and smoothness at 8%, I recently found about this out and my planes started looking less weird