Color contrast is too low between Color.red and Color.green

[hcientist]

cspogil/CS1/Act24/src/Drawing.java

Line 91 in ad82bc3

g2.setColor(Color.GREEN);

in this activity, we have a white background on which we draw rgb(255,0,0) and rgb(0,255,0) (see eg Color.java ). Perhaps (at the risk of slightly complicating the models?) we should use colors with more contrast. At the very least we might benefit from using anything other than specifically red and green due to the prevalence of r/g color blindness.