What color bottle cages would you throw on this frame? The white is a pearlescent color that sometimes looks a bit blue in the right light

Chrome, you’ve got it in back and in front, add it in middle with bottle cage.

I would go with pink cages and bar wrap

Silver, brushed aluminum, or grey. The bottle cages are not the hero colour on this build, the frame is … so I wouldn’t try and amplify it.
If your cranks are black you could do that as well.
It’s a beautiful frameset, ride it well and send pics of the completed build

White

Silver

Any nitto cage you want. Stainless is always classic and goes with anything.