Why in the world are many of them in 'camo' colors?

Examples:
The pruning shears I've lost several times in the last few days that are
leaf green and yellow. After dropping them they blend right in with the
vegetation.

Carpenter's pencils in natural wood. Found a great deal on a couple dozen at
the borg. At the end of the day several are invariably swept up with wood
scraps and sawdust.

I know this is a silly post, but what could the reason be for such stupid
colors?