They're cool enough as it is, why do you feel the need to post a neon photoshopped one?
Is the non-photoshopped version?
The head shape suggests he's venomous, but that outfit says he's fabulous
They have a range of colors. Some are green, some are not.
Unaltered color of the snake in question.
Members of this genus come in an amazing variety of colors and patterns, often within a single species. A. ceratophora and A. squamigera are particularly variable
There are 10 recognized species. They're not all green. The one in the OP looks color enhanced at least, but it's not true that all are green.
Yes, but this is a commonly reposted Photoshop.
No, they're green.
Most pretty things are.