I don't think it's like chalk because it would be very close to Sting gray. Also, pics of earl on Jeep's web site have a very heavy blue tint. Obviously that's not what the color looks like in real life, but I am afraid to change my order because I definitely want a flat grey color without any blue in it. I also found this on Youtube and I think the color definitely has hints of blue in the sun:Earl looks to be very similar to Porsche's Chalk (or Crayon if you are in Europe)
Pretty sure the car above with the blu-ish tint is NOT earl.
I'm sticking with Sting Gray for now.