Sure is! In fact it's one of the ways I would distinguish a blue apart from a lavender
Your earlier comment about crest - a crest can vary in size and location on the face and often the type and size of comb can influence this.
Now that he's showing reliable signs of being blue and crested - does this help you narrow down his parentage??
Here's one of my blue chicks at approx 16 weeks.. to show the potential difference in blue shades. Note his crest is quite a ways back on his crown.
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And here's one of my other blue chicks that grew in a proper mop of a crest! Very forward on the head.
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A picture of my blue rooster - showing the charcoal (near black) feathers. He also has the "bushy eyebrows"
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