Readings & Meanings:
The color gray (灰色) can also be called mouse-colored (ネズミ色).
We drew the line for the dodgeball game with lime.
Because of the volcano eruption, the surrounding area became full of ash.
Radical is 火. It's stuck in a roof-like element that is actually 又, the hand that indicates action. It originally indicated what you take out of a firepit (after the fire is gone).
Well, when I said the roof was 又, I was referring to the archaeological evidence from before 206 BC. After that, the hand was turned into a stove-like shape in 厂.