how to generate customize color

hi,

I have a matrix m as follows:

     1     1     1     1     3     3     3     4     4     4
     1     1     1     1     3     3     3     4     4     4
     1     1     1     1     3     3     3     4     4     4
     1     1     1     1     3     3     3     4     4     4
     2     2     2     2     2     4     4     4     4     4
     2     2     2     2     2     4     4     4     4     4
     2     2     2     2     2     4     4     4     4     4
     3     3     3     3     3     3     3     4     4     4
     3     3     3     3     3     3     3     4     4     4
     3     3     3     3     3     3     3     4     4     4

here different values show different region. I want to have different color for each region. How can I do that? Its a example. In practice, the matrix has many regions. how can i have different color for a image matrix of dimension 3. For example

    segPart1=zeros(10,10,'uint8');
    segPart2=zeros(10,10,'uint8');
    segPart3=zeros(10,10,'uint8');
for i=1:4

    d=find(m==i);
    segPart1(d)=85;
    segPart2(d)=145;
    segPart3(d)=85;
    C = cat(3, segPart1, segPart2, segPart3);
end

this will make a color little bit blue all the four region. But I need to have a technique how could I make each region fill with different colors. Is there any one to help?