Can I label all similar colored lines in one figure with subplots?

Hi everyone,

I would ilke to label the lines that are getting the data from the same column with a common name, rather than naming the lines per subplot.

In the following example, I would like, for examle, to give a common name to all yellow lines as 'yellow', rather than naming the yellow line on each subplot.

rng(1)
for i = 1:5
   A{i} = randn(10,2); 
end


for i = 1:5
B1(:,i) = [A{i}(:,1)]; 
B2(:,i) = [A{i}(:,2)]; 
end

figure;

subplot(2,2,1)
filename = plot(B1)
hold on

subplot(2,2,2)
filename = plot(B2)
hold on