outland144k
That's what I thought you meant. I left it the original color so it wouldn't match the theme. Believe it or not, it's pretty clear that they didn't change it in Tungsten to match that theme; that's just a coincidence. The question is raised because in Mercury the waveform button to which the color corresponds is the same color- it's an ID color match (which is not to say someone can't prefer it changed), is the Tungsten accent color, and it would have no reason to be that color without the waveform preview default color matching the waveform preview button.
I don't know that this particularly helpful. But the omission wasn't an oversight.
This is all offered in the spirit of FWIW. Your mileage may vary. 
Oh I wasn't suggesting it was necessarily something you'd missed. Just that the red waveform itself seemed a bit off to me, so I changed it to match the theme. Just preference really. It's awesome that the editor allows us to do this sort of thing!
Also I'm colourblind, so the more bright yellow contrast, the better! :D