There are some makers and shops out there that do make fully carved blonde and/or very light coloured instruments. I haven't seen very many true "blonde" instruments like the Engelhardt Swingmaster, but there are plenty that are more of a golden/amber finish out there. We have access to some really fantastic looking wood now, and a lot of makers are using a finish that really lets the figure be seen, instead of really dark finishes that can hide it. It ultimately comes down to the maker or shop as to whether or not they want to make such an instrument, but it wouldn't hurt to ask if you have someone in mind and are looking for a bass to be made.
As far as looking down on them in an orchestra/jazz setting, I mentioned before a lot of people hear with their eyes. There are plenty of conductors out there that think bright looking bass means bright sounding bass, dark looking bass means dark sounding bass, and it is pretty rare for an orchestra bass section to lean towards a brighter sound. There are also some musicians that think only an old instrument can be a good instrument, who again hear with their eyes. It is also pretty rare to find a really great instrument that brightly coloured, so a lot of people wouldn't give it a fighting chance.
Will you lose gigs because of it? Maybe. There are absolutely people who hire based on a particular aesthetic they are going for. That can also have more to do with your haircut/colour, dress, age, or anything else than the bass you are playing. Sometimes that can be a real drag, other times you realize that you really don't want to work with someone who cares more about the colour of your instrument than the sound coming out of it.