Isolate brown by rgb values [closed]

Question

I am looking to isolate "brown" colors by rgb values. Not just 1 brown color, but the wide spectrum of colors that are perceived as brown - tan, suede, dirt, etc.

Any ideas on how to do this? I'm thinking that maybe if Red is less than 128, and Green is between 70 and 138, and blue is less than 128, than it appears brown. Something along those lines.

Answer 1

It really depends what you consider to be brown. It is a colour category for which there is rather high inter-subject variability and strong contextual effects (colours next to it changes how it looks).

Think you need to use something like this: http://www.colorpicker.com/ and look at the shape of the colours you decide on and then work out how to express that algorithmically.