I don't think it matters mate, the business end should have a decent fluro carbon leader of a couple of meters which the fish hopefully don't see...

I use white and looks better for longer as the colour doesnt bleed. caught more fish on white, but that may be to do with the fact its just far better braid and i had it on for longer. def benefit for bright braids in being able to see line but not sure if the fish notice or not

Yeah, I didn't realise how much I sight fish by line movement in SBing until I tried some black braid.  One morning was enough.  It went back on the manufacturer's spool and into the cupboard, where it's lived for the last 5 years.  I'd even feel unhappy selling it second-hand.

teflon coated braid by berkley, chartruse colour, is the goods. the teflon coating helps the sink rate and a more natural drop of the bait.
i am now on my eighth year without a break on the main line.
i dont wash with fresh water.....thats a no-no to me.
 i run the line through a soft cloth now and again.
it is the most expensive but in fishing gear it pays to buy the best.