I'll get a little personal with you. My sister died in 1994. She fell asleep in her dorm room and just didn't wake up. Two autopsies turned up zero. As you can imagine, my parents were crushed. They were turned into zombies for days. (I probably did too, but self analysis of that kind is pretty hard when everything around that time is a blur.)
The day of the funeral we were at the graveside service. On a perfectly sunny day, a rainbow showed up out of nowhere. I kid you not. There was no rain that we could tell anywhere. My parents attached some meaning to that.... which I'm fine with. They read that rainbow as "She's letting us know she's OK". And they turned a corner. They came back to life and were able to move on. Yes, that event changed them forever and took some wind out ouf their sales permanently. But it wasn't the crushing blow it had been until that rainbow.
So as far as I'm concerned, there's no such thing as a bad rainbow.... or a bad picture of one. They make me smile every.... single.... time.