People keep telling me this as an excuse but the original color scheme was more pleasing to the eye. The current color scheme is painful to the eyes. I know because I see the ugly green bubbles on my messages app on my iPhone. I also have an iPhone 3 in a drawer that sadly no longer works.
You know you wouldn’t want to swap the green and blue bubbles.
I run dual sim, so my other number is not enrolled in iMessage and is all green. I don’t care and imagine most people don’t. It’s a neutral, normal, natural green color.