This is typical of a quality light brahma chick. I think maybe the hatchery birds that are poorly colored as adults may start out white as chicks. I can post some adult pics if you would like. Or you can check out the Brahma thread on the "breeds, genetics,showing" section-lots of pics there.
Most of my light brahma chicks(bantams) are smokey gray with some white, I've only had one or two ever that were solid white. Maybe the standard chicks are white? I've hatched around fifty this year. Rareroo, do you breed brahmas?