how can I give arrow to a particular color in MATLAB?

QUIVER Quiver plot. QUIVER(X,Y,U,V) plots velocity vectors as arrows with components (u,v) at the points (x,y). The matrices X,Y,U,V must all be the same size and contain corresponding position and velocity components (X and Y can also be vectors to specify a uniform grid). QUIVER automatically scales the arrows to fit within the grid. QUIVER(U,V) plots velocity vectors at equally spaced points in the x-y plane. QUIVER(U,V,S) or QUIVER(X,Y,U,V,S) automatically scales the arrows to fit within the grid and then stretches them by S. Use S=0 or S='off' to plot the arrows without the automatic scaling. QUIVER(...,LINESPEC) uses the plot linestyle specified for the velocity vectors. Any marker in LINESPEC is drawn at the base instead of an arrow on the tip. Use a marker of '.' to specify no marker at all. See PLOT for other possibilities. QUIVER(...,'filled') fills any markers specified. QUIVER(AX,...) plots into AX instead of GCA. H = QUIVER(...) returns a quivergroup handle. Example: [x,y] = meshgrid(-2:.2:2,-1:.15:1); z = x .* exp(-x.^2 - y.^2); [px,py] = gradient(z,.2,.15); contour(x,y,z), hold on quiver(x,y,px,py), hold off, axis image See also FEATHER, QUIVER3, PLOT. Documentation for quiver doc quiver