References, etc.
A test in color coordination Offical Text
Grade 3 
Grade 2 
Grade 1 
Image Analysis Methods
Colors within a certain color difference in an image are grouped together as the same color. The most common color among them is the BaseColor, the next most common color is the AssortColor, and the remaining colors that are outside the certain color difference and fall within 5% to 10% of the total are the AccentColor.
The color difference is calculated by CIE76.
About Traditional Colors
Data
This app use the following Wikipedia data.
This data is licensed under CC BY-SA 4.0. To view a copy of this license, visit https://creativecommons.org/licenses/by-sa/4.0/
Determination Method
The top 3 color names are extracted from the color names within color difference ΔE6.5 from the target color.
The color difference is calculated by CIEDE2000.
About Munsell Color System
Calculated based on CIELAB values using real.dat from Rochester Institute of Technology (RIT) research materials.