You know, I might carry a hideous pink gun just because it would look better in court if I ever had to use it.
Now someone just needs to make a "cuddly bunny" brand of defensive ammo.
I like many guys often like a classic look or even the tactical or "evil black" look. On guns, knives etc.
Some of my favorite knives for example look pretty nasty, while being less dangerous than your typical kitchen knife.
But I often kick myself when I think about how such a thing would look before a jury. Even if no more dangerous, the sinister appearance of such items bumps of the severity of the item and actions in a court of law. Changing the impression of you before the jury, and tipping the scales slightly more against you.
So on that note, there is certainly an argument to be made for a pink gun.
However a perp is also much less likely to believe it is a real gun. Which may in fact result in the need to fire more often.
While most self defense scenarios in the US never require the firing of the weapon.
Being more likely to need to fire your weapon means you are more likely to deal with the legal and financial headache after shooting someone.