What color Am I?

Some claim its

at worlds end.

A flag waved high

that foreign lands defend.

It may fill you with envy

or remind you of greed

It may slow me down

or bring me back up to speed.

A symbol of life,

or remarkable good dead

The flush on your face

emits jealousy

The last stroke of summer

as it gives way to fall

or the creeping of moss

as it grows

up a wall.