Some parts have stamps with LEGO logo and production info:
Element ID 4177728 (Pearl Light Gray) has incorrect image in Lego cache.
Click on a colored part below to see the Sets and MOCs that use part 41677 Technic Beam 1 x 2 Thin in that color. You can find an overview of all LEGO Colors here.
This part has been used by MOCs in the following colors but not officially released.