How to see difference in color which has been overlapped between two fills?

I have two curves; for example

clc; clear all; close all;
x1=[-1:0.01:1];
y1=1-x1.^2;
x2=[-2:0.01:2];
y2=1-x2.^2;
fill(x1,y1,'k')
hold on, fill(x2,y2,'c')

Now I want to see clear difference of color which has been overlapped.As of now can only see the dominating color (in this example, I could not see black color. I wish to see resultant color (resultant color of combination of cyan and black) of overlap. Kindly help

Answer 1

[Image Analyst]

Specify the 'FaceAlpha' opacity/transparency factor:

fill(x2, y2, 'c', 'FaceAlpha', 0.6)

[Image Analyst]

Ajay, did that work for you? Let me know.

[Ajay Goyal]

No sir, My purpose is not yet solved. Please find the attached 'untitled2.m' file. Please run the code. this plot should have three curves; one filled with cyan, other with black and third with white. I want to get combine effect of color filled with cyan and black but white part should not be affected.

[Walter Roberson]

x2=[-2:0.01:2];
y2=1-x2.^2;
fill(x2,y2,'c')
hold on

x1=[-1:0.01:1];
y1=1-x1.^2;
fill(x1,y1,'k','faceAlpha',0.6)

x3=[-0.5:0.01:0.5];
y3=1-x3.^2;
fill(x3,y3,'w')

[Ajay Goyal]

thank you sir