Is 'Jou' really wrong?
'Jou' is for when 'you' is used as the object. Here, it is the subject, so the 'jij' form is appropriate
Why de oranje I thought all colours had het before them?
The "de" is for the "kleren" not the color ("oranje"):
Ik wil het wit schaap.
Ik wil de witte kip.
(Not a native speaker by the way)
Why is je not correct instead of jij?