The main purpose of the Colour Box is to develop a child's visual sense of colour. Primary colours (Red, Yellow and Blue) are introduced in Colour Box 1, which is first presented to a child at 2.5 to 3 years of age. Colour Boxes 2 and 3 add more tablets to the mix, expanding a child's colour knowledge.

Brown kraft and white are the most common shipping box colors because they are the two most naturally occurring colors of corrugated board. Choosing any other color for a shipping box requires printing the color onto the corrugated board. Typically, this process involves printing the color onto mottled white cardboard.

as a color. This is completely commonplace among art directors, designers, and other such trendy types. The answer is 'kraft'.