I agree with JAX. I see from your profile you use Photoshop ?? If so just put an adjustment layer( Brightness / contrast or hue/ saturation) over top the whole thing.Add a layer mask ; Invert it then paint on the mask to hide or reveal as much brightness as necessary wherever you want. I love Adj layers and mask as they are totally non destructive and adjustable. Sorry for the PS lesson Ive had alot of sugar today !