This will generate an ishihara test svg file.
- It generates a set of random circles of varying sizes and colors.
- It chooses between two base colors (in HSV) based on a mask
- It varies the Value of the colors independent of the base color
The generated SVG will then be able to tell if you can differentiate the two base colors apart.
The following image was generated by this script, and it points at two colors that only colorblind people seem to be able to differentiate. If you are colorblind you should see a number 4.
