Quick photoshop question.

I know this is easy to do, I just can't quite figure it out.

I want to take a picture, make it into a greyscale image, then add color.

I want the final product to be something like this:


but I want to add the color green instead of blue.

Anyone know how?

 

Well it'd be better asked in the graphics section. Not general chat.

 

Adjusting the hue and saturation levels could possibly give you that effect