Desktop icons in coloured boxes

Its suddenly that i observed that my desktop icons have been covered into boxes of gray colour and when i point on any icon, it turns light blue. There is no problem with the working of my computer. But then it doesn't looks good and fades the shine of desktop photo. Only the recycle bin icon is not shown in the gray box, others all. Is it some kind of a weird problem? I want to get the previous looks back.

Did you ever played with the display property settings in the desktop tab? That must have changed the color settings of desktop icons. No need to worry about that. There's no harm to your PC.

Its fine that there is no harm to my computer, but how to change it back to normal?

In desktop option of display properties, you can change the colour settings as you like.