Here are some examples of current basic brick boxes:

Of those, only 5749 has a significant number of gray bricks, and it still includes much less gray than black, blue, green, red, yellow, or white. Here's what the contents of 6177 look like:

6177 contents

In my collection, the grays are much more common than lime and orange, so why aren't grays well represented in these sets?

  • Because they are not colourful to children? – Alvin Wong Jul 19 '13 at 15:12


This eHow article explains quite well why people (children in particular) are attracted to bright colours. Whilst it doesn't directly relate to LEGO, or toys in general, it does make quite a few good points about the effect colours have on our choices:

"According to a 2005 research article published by the BBC, children can see and even appreciate colors as early as four months old. At that age, however, their eyes may not yet be sufficiently developed to recognize various shades of color or differentiate dull colors like grey and brown."

This doesn't really apply to the sets you've shown which are marketed towards children aged four and over, although it may apply to Duplo sets which are made for younger children.

"a preference for bright colors may be a result of evolutionary developments. Many naturally occurring foods---like tomatoes, apples, oranges, bananas and berries---are bright, bold colors when they are ripe and ready for consumption. By contrast, almost all fruits turn a brown, black or gray color as they pass their readiness for consumption and begin to rot."

Here we have another reference to an ingrained biological behaviour, It's probably insignificant considering how the majority of the bricks and the packaging are brightly coloured.

"adults typically associate bright colors with fun, happy times. For this reason, many parents bombard children with brightly colored gifts, paint children's rooms bright colors, and deliver marketing and entertainment messages to children through the use of brightly colored cartoons."

I can't claim to know a thing about psychology but from my experience building models as a child, I know that the focus has always been on building something you can play with. A few gray pieces here and there wouldn't stop me from building a car with psychedelic mixture of colours


Supposing you're a child and you ready to build something from the real world that's both gray and exciting. Well, there are a few animals like elephants, rhinos and wolves you could build but other then that there aren't that many realistic things you could build apart from castle walls, boulders etc... (You are welcome to challenge me on that point)


Keeping the amount of colours to a minimum, makes the manufacturing process cheaper. Fewer part bins need to be sourced and delivered to the packaging area (although a large part of this process is automated).

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