Compression test results and plug color question.

What's that plug read from? Did you just take um out after driving around or did you do a wide open blast like you're supposed to and cut it immediately off? Exactly WHAT are we reading here? If it's idling in the driveway, They look pretty dang good.
Yes, it was just idling in the garage till warmed up. Didn't know about doing a wide open blast before pulling the plugs. And I didn't really pull them to read the plugs, but to do the compression test. Just thought I'd ask what you guys though cause #8 looked so much more white than the rest.