One of the crucial things that changed with iOS 7 is the way backgrounds work. Most notably, the glassy dock was chucked out for a more translucent background that picked colors off the wallpaper. But you can change the dock color to a muted gray.
This short tip is for users who want to change the dock color in iOS 7 on their iPhones and iPads. Not quite interestingly, you can't configure the dock background to have a specific color. You can only remove the translucent feel of the dock. Read on.
How to Change the Dock Color on iPhone, iPad, and iPod Touch
Step #1. Tap on Settings on your iDevice.
Step #2. Go to General.
Step #3. Tap on Accessibility.
Step #4. Scroll down and tap on Increased Contrast
Step #5. Turn ON the switch for Increased Contrast.
Step #6. Close the settings app to see if the changes have taken effect.
You should see a dock with a gray background. As I said, it's a muted gray that isn't very impressive. But if your background is producing an oddly-colored dock, the muted gray might be a better thing to have.
One good thing to come out of this is that no matter what your background is, the dock color will remain unchanged. And the four icons on the dock do get the prominence they deserve.
There is one negative aspect too. The Control Center will lose the slight translucence and will no longer have a blurred background seeping through it. Instead, it's a flat tone. But that's about the only change I saw after turning ON the Increase Contrast setting.
You might also be interested in other iOS 7 changes that you want to tweak. Here's one on motion-sickness associated with iOS 7. Check out our other iOS 7 how to's for customization/changing things in iOS 7.