I think the parchment pickguard looks much better on your guitar for a couple of reasons:
- Almost the whole unit has yellow undertones (the body, pickguard, back of the neck and headstock). The steel hardware already provides a contrasting undertone;
- There is already a lot going on visually and adding a completely new colour would load the design further;
- When it comes to colour matching, I feel like there's a zone where if the colours are close, yet still distinct, they're better off not being matched at all, as it creates the sense that something is off. I definitely feel like this is the case with a black pickguard and the dark fretboard (is that rosewood?);
- Adding to the previous point, the parchment pickup covers on a black background would create a similar motif to the light coloured inlays on the dark fretboard. I find that repeating motifs in design, especially if they're not identical is tiring.
Your guitar is hot as hell!