"He is in the white shirt."

Translation: Er trägt das weiße Hemd.

[blas3nik]

Why is it "in dem" (dative) and then "weißen" (accusative)?

[christian]

"weißen" is dative.

http://en.wikipedia.org/wiki/German_adjectives#Weak_and_strong_inflection

[blas3nik]

I see... Thanks!

[Dr.Seledki]

why is "er traegt das weisse Hemd' incorrect