@T,
b = [0 0 1]; % Blue
r = [1 0 0]; % Red
%x =[27.5 26.8 68 70.5 43.5 45.2 72];
%y = [7.2 3 7.9 1.7 4.23 1.057 0.89];
x = rand(1,1000);
y = rand(1,1000);
y_min_max = [min(y);max(y)];
color = interp1(y_min_max,[b;r],y); %initial color based on y value
lightness=(x-min(x))/(max(x)-min(x)); %lightness of each point, in [0,1]
lightness=repmat(lightness',1,3);
color2=color.*lightness; %adjust lightness of each point
figure()
s = scatter(x,y,80,color2,'filled');
grid on; grid minor; box on
xlabel('x')
ylabel('y')
Good luck.
