for me its a no no unfortunately, i initially and still have in my blue car, ATE racing blue DOT 4, which is no longer available, and extreemly expensive when if does come up, i last paid £150 per litre, but purely for its colour
my purple car has silicon fluid, again initially because of its purple colour, and ive put this in several cars now, really good, as long as you dont aerate it too much prior to bleeding
i had an under bonnet weep/leak on the DOT 4, this stripped the paint, so never again will i use DOT 4, silicon fluid doesnt harm anything, as long as the system is clean at fill, and its for life, whereas DOT 4 is Hydroscopic and sucks up water, and has a limited life as a result, i read on the net that the americans control the colour of brake fluid, and that they have colour charts that tell them how much water is in it by its colour, and it was them that banned the blue for road use
while i also agree tho, that if your gonna race the car, silicon is not for you