Iphone 4 camera.everything comes out black & white?

I have the iphone 4 and since yesterday when I open my camera everything is in black and white. Only if i use the front camera it is in color. But, when I use the rear camera it just comes out black and white. Anyone know how I can fix this?

Thats weird

Consult your manual and check the camera's menu settings. B/W is probably an option, but it isn't the default setting.