I have several pictures that I want to fix. The pictures came to me from a scanner and there is no way that job is going to be done again by the person who did it. I know for a fact that all the pictures should only have 2 colors: #ffffff and #132740. The #132740 is the background color.
But the images have many colors like this: wrong color image http://bedoya.co/wp-content/uploads/198A_85_180_3500.jpg
What I want to accomplish is something like this:
I am using Gimp 2.8.14 for this task, thank you for any advise