I bet you took these inside with the house lights on.
A sunny window or trip outside will give you better colors.
If you have Photoshop, go to Levels (Command L). In that window pull down the menu RGB.
Work from the bottom of this list up.
There will be a graph with a 'mountain' in the middle and 3 arrows under it.
Drag/pull the outside arrows until they 'touch the base of the mountain'
Leave the middle arrow alone.
Do that (only if necessary) with each color:Blue, Green, Red.
Last step set the menu back to RGB and use the middle slider to lighten or darken the image. You can go back and 'fiddle' as long as you don't hit OK.
This isn't the *right* way to fix the color, but it is fast and good enough for average (non-published) use.
Enjoy,
Ebb