The Colored Panel. With this item, you can make pixel art and decorate your ship's background color. This item does not block player's movement or a item's movement.
If you right click or simply press "R" on your keyboard you'll be able to select the panel's color from a unique color palette. colored people like to use them the most.
This item can be made at a Engineering Fabricator. 1 Panel can be crafted from 2 Metal.