It had been raining on and off all day, slithery rivulets and slow drips. Gray, flat sky to make all the other colors hum and spark when you turn away.
Like stained glass windows - near-transparent green fenced in by solid black. Odd effect from a living forest. The greens felt so thick you could breathe them.
Or bathe in them.
I'm going to describe this grasping, tentacled tree as 'chthonic', because that word doesn't get used nearly enough. And because it's rather late here.