If my 5 (well, I have an 8 yo and a 2 yo) year old gave me some grips like those for one of my pistols, I would proudly wear them. They are different, which makes them nice. No need to go with what everyone else likes. I am sure those green grips won't make you any more visible in the dark than any sort of light reflecting off of your stainless anyway.
Personally, I want to gag every time I see a firearm in OD Green. It's all personal preference.
Are they ugly? Nope. Are they mainstream? Definitely not. Functional for their intended purpose? I bet they are.
I would always start the conversation with "Look at what my 5 year old picked out for me this Christmas. Aren't they great?"