SetTitleColor — Set the color of the main plot title
$plot->SetTitleColor($color
)
SetTitleColor
sets the color of the main plot title
(as set with SetTitle), and the default color for the
X and Y titles (as set with SetXTitle and
SetYTitle).
The default color for the main title is black.
Use just SetTitleColor if you want all three titles to have the same color. If you want different colors for the main, X, and/or Y titles, use SetTitleColor to set the main title color, and use SetXTitleColor and/or SetYTitleColor to set the color of the other titles.