Yes, despite the color, at least all of the earlier King Conan DH Trades have had all of the chronological issues & the covers.

As was said, the first 14 volumes of the Chronicles of Conan didn't have the covers, and also IIRC there were at least 1-2 issues missing due to rights involving the Red Sonja character.

The 2 Conan HC's that DH later reprinted with the Barry Windsor Smith issues did have the covers, and IMHO were decent collections.

At some point, I would like to see the entire Conan the Barbarian series reprinted with all of the issues & covers - maybe in a series of Omnis or Trades (I would take this either way).