As far as Islamic Shari`ah is concerned, there is nothing wrong for hijab to be colorful and artistic as long as it is not unusually attractive. One of the objectives of hijab is modesty and bashfulness. A Muslim woman is obliged to wear hijab, which is part of the beauty and ornament that cannot be concealed.
Sheikh Mohamed El-Moctar El-Shinqiti, director of the Islamic Center of South Plains, Lubbock, Texas, states: Almighty Allah says, [They (women) should not display their beauty and ornaments except what (must ordinarily) appear thereof] (An-Nur 24:31). Hijab is part of the beauty and ornament that cannot be concealed, and should not be concealed. There is nothing wrong for hijab to be colorful or artistic unless it is unusually attractive and flashy.
As for Islamic fashions and using models, they go against the objective of hijab, which is modesty and bashfulness. Therefore, I do not think it is permissible. Prophet Muhammad (peace and blessings be upon him) said, “Allah is Good, and He only accepts that which is good.” And for every good thing, the means toward achieving it must be good as well.