What is the average color of soil? Where I live the soil is red.

Is there a map or chart where you can see the average color of the dirt according to geographical location?  What would the color be if all of the dirt on Earth was added equally to a pallet?

I understand that composition of minerals determines dirt color but what makes dirt its color is not the question I am asking.

Kata Tjuta, Northern Territory, Australia



Sagada, Mountain Province, Philippines



https://eugeneexplorer.wordpress.com/2016/11/22/blue-soil-hills/

Gentry County, Missouri, United States



http://www.airphotona.com/image.asp?imageid=11944
This gif, prepared by the United States Department of Agriculture - Natural Resources Conservation Services (USDA-NRCS) soil scientists at the National Soil Survey Center, has soil colors based on the Munsell Color System for the United States at different depths:



The soil colors nearest the surface are darker due to more organic matter and are lighter at depth with varying colors by region.

Source: http://munsell.com/color-blog/soil-colors-national-parks-anniversary/

This link also has soil colors of select United States National Parks.  For example: