Accidentally changed Default Display color setting.

My niece was sitting on top of my keyboard, so I assume she pressed some keys that changed my default color settings.

As soon as I took her off, the screen looks darker, and vibrant.
If you are familiar with photoshop, my desktop now looks like it has been "colordoged".

Please help. I want it back to the default settings, because I do design work, and this would have serious problems. Thanks.

I also tried the Color settings and calibrate thing, and it's not what I am looking for.

ps. As soon as I start up my computer. the image for my desktop is original, and a few second as it loads up, it changes into this weird color doge setting..

Thank you!

Hold down all three: ctrl + option + command

And then tap the '8' key.

Thank you.
Although that only invert my display screen.
I was looking to change it back to it's color default settings..

I did that too. But it was mister "beerhead" that did it!!

Yet again i thought i was Steve Jobs and buggered the thing up haha

malfunction - Have you had a look in System Preferences/Displays/Colour it should have a default choice there.