Yep...Matt is right on the money.
I have a white 8-man and decided to keep it forever. The lighter colors are more translucent and amenable to living in, if weather locks you down. My new Sawtooth is brown but Silnylon is still thin enough (and offers good light passage) that it's not bad. As Matt mentioned, the white liner adds a good degree of brightness within, akin to painted walls in your home. I've never been a fan of dull, dark colors in tents. I'll take a bright one every time. Can't say what makes other guys happy, but hopefully you know what's important to you. I also think visibility from the air is a good thing. It discourages other hunters from dropping in if they can easily see a big bright tipi. It also could aid in rescue location in the event of a disaster.
For anyone interested: Snow Peak makes a great little light called the Hozuki. Mine is the mini-sized one. Runs on 3 x AAA and makes a very superb overhead light in a tipi. About $50, but I'd spend it again in a heartbeat.