Hi, I've just started using Processing, so please forgive my ignorance.

I have the following, and I'd like for the color of each ring to blend with color of the rings below. I can achieve something similar with opacity, but I'd achieve some sort of subtractive color mixing, a la: http://www.csusm.edu/iits/trc/training/lessons/graphicDesign/d5color1/Subtractive.gif

Here is what I have:

int[] colorVal = { #00aeef, #ec008c, #fff200 }; // set up colors

void setup() {
 
 colorMode(RGB, 225);
 size(800, 800);
 background(225);
 ellipseMode(CENTER);
 translate(400, 400);
 noStroke();
 smooth();

 for (int i = 0; i < 400; i++) {
   for (int x = 0; x < 3; x++) {  
     float a = random(0,10);
     float b = random(0,10);
     noFill();
     stroke(colorVal[x]);
     ellipse(a, b, 2*i , 2*i);
     
   }
 }
}

Any help would be much appreciated.

- Samuel