The icons are in gray

Make sure you have Icon Tint disabled.

Also check to see if you have Chameleon enabled.

Thank you very much

I suspected it was just an option to disable, but I couldn't find it.

Hello,

Sorry to bring this up again, but although the desktop icons are in color, the ones in the fences are in black and white.

Check your Personalization Settings again. When you change the Background Color of a Fence, occasionally Icon Tint is automatically set back to on.

Thank you, it works.