disable border blue in scatter plot

I'm building a scatter plot and I would that some points in the plot should be red.

scatter(nodes(:,2),nodes(:,3),'filled');
hold on;
scatter(heads(:,2),heads(:,3),'^','markerfacecolor','red');

unfortunately if they are red they have still the border blu.How can I delete the blue border?

Answer 1

[Robert Cumming]

you also need to set the markeredgecolour property

[Salvatore Mazzarino]

I add markeredgecolour

scatter(heads(:,2),heads(:,3),'^','markerfacecolor','red','markeredgecolour','red');

I got an error

[Salvatore Mazzarino]

ok now work...it was markeredgecolor