Hey @halfpint1 I don't have a Chromebook however I did find something that turns the color on and off.
When you are on the internet, look in the upper right hand corner of your display screen.
See if you can find a star shape near the top of your screen. Immediately to the left of that should be something that is shaped like an eye.
Look at the picture below. If the eyeball shaped thing next to the star shaped thing is highlighted in blue, then you have accidentally turned off the color on your Chromebook.
Just click on the eye shaped thing and restart the Chromebook and I think the color will come back on your screen.

There are times when you must speak, not because you are going to change the opposing side, but because if you do not speak, they have changed you.