Rainbow Om on black with salt

I was just playing around with a couple of techniques here. I used the simple design of the "om" symbol to practice blending blue, red and yellow. At this point I wasn't sure I was done yet so I put a black wash around it and salted it. The salt technique did not turn out as well, not the same texture, as the first time I tried it on "Starry Night"... maybe because I used regular salt instead of sea salt?

Before I added on the black background...