For example I use this image:

I first convert it to grayscale, and then use colorfilter. I get something like:

I've lost some detail at the bottom. I want to end up getting something like:

The hex code for the red color is #960032
Code: Select all
convert 0Z3wSND.jpg -fuzz 5% -fill white -opaque "#ECE5D3" -colorspace gray +level-colors "#960032,white" result.png