Lockscreen Multicolor Issue

Hello,

I m using iphone 5s and my operating system version is "iOS 7.1.1 (11D201)". Facing a issue with my lockscreen. I had tried using lots of multicolor wallpapers in my iphone but on the lockscreen at the time of Enter Passcode the background dont show me a multicolour numbers. It always give a fully single shade of colors.

I have seen this in other iphone5s that it always pop up with multicolor. How to fix this Problem. PLZ HELP. Thanks in advance.