gtk:text-tag-underline-rgba (object)

object -- a gtk:text-tag object
color -- a gdk:rgba instance for the color

The accessor for the underline-rgba slot of the gtk:text-tag class gets or sets the color of underlines. If not set, underlines will use the forground color. If the underline property is set to the :error value of the pango:underline enumeration, an alternate color may be applied instead of the foreground. Setting this property will always override those defaults.