From my experience it looks a tad lean to me, I like a hint of tan/sandy color to mine to be safe...Was the plug removed right as you finished the WOT runs? Or did you drive around cruising for a bit afterwards?
I always check my plugs at the track right as I enter the return road, I pull over and pull one asap, thats the most accurate way to read em.
What kind of carb?What Jets?what weather conditions? also how high compression on your motor?
On a side note, Why did you cut them opened to read em? You dont have to do that..