Lately, I've been "breaking in" my wife's S&WM&P Shield 9 and her black, soft Tagua IWB holster, worn just behind my right hipbone.The spare magazine rides on the other side in a small, cheap "Uncle Mike's" black, soft, IWB holster
In public, I often wear black Dockers and a black turtleneck or tee -- with a cover jacket or un-tucked cover shirt.
Several times, it's been warm enough that I removed my cover garment while among a sizeable gathering of people. So far, no one has even appeared to notice that I'm openly armed.
The all-black rig, belt and clothes seem to make the black weapon & rig almost invisible.
Surprisingly, the same is true when I carry my usual HK P7M8 in its outside Alessi holster...
That's in rural/small town Texas; reactions elsewhere might be different ...
Spring and fall in colorado can be tricky as the temperatures can vary during the day. I IWB with a sweatshirt in the winter and aloha shirts in the summer. I keep one of each in the car so I can change as the temperature does. Haven’t done open carry except when hiking and, even then, usually have a loose cover garment.