It is quite common to see people with colorfully decorated tallises in non-Orthodox (especially Conservative) shuls, but much less common to see the same thing in Orthodox shuls. Is there any halachic issue with having a decorated tallis gadol?
I'm pretty sure if you have a red or blue talith, the sSisSith have to be the same color, with a techeilath in the middle. I am not sure as to why Orthodox Jews don't wear colorful taleithim, but the closest I saw to colorful was a regular talith with blue stripes instead if black. In yemen, the teimonim wore a talith Jodol all day in and out of shul, some wore a black cloth with I assume black sSisSith on them.