An ugly summer storm blew through our area yesterday, and a glance outside the window at our backyard revealed a stark contrast between the green grass and the near-black of the clouds in the sky. As a further example of how life imitates Brain Games (or vice versa):

By changing only one letter at a time,
and leaving all others in their existing order,
create a word ladder that changes
the word "GREEN" into the word "BLACK."

We did it in seven steps, and HERE is our answer. If you find another answer (shorter or not), please post it in the comments.

ONE ANSWER (there may be others):

GREEN
GREED
BREED
BLEED
BLEND
BLAND
BLANK
BLACK