Sorry Jack, I'm with the others. My monitor is calibrated as well and even though I know exactly what a guitar headstock looks like I had to really struggle to work out the outline. I managed eventually but had you not said it was a headstock I wouldn't have seen it in a million years!
In actual fact, when I first started looking at the picture, I thought it was a dark shot of a clarinet or some such instrument standing on its bell end!
If you want this to work, you'll need to lift it considerably. Basically we should all be able to see what it is without reading the title for it to be effective. if not, we should see something there that we consider to be an abstract piece of art, I can't even see that here.
Back to the fretboard.... whoops, sorry, I mean drawing board
Cheers,
Rob