the color to use for primary cursor (does not need to be allocated), or NULL to undo the effect of previous calls to of gtk_widget_override_cursor(). [allow-none]
the color to use for secondary cursor (does not need to be allocated), or NULL to undo the effect of previous calls to of gtk_widget_override_cursor(). [allow-none] Since 3.0
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Sets the cursor color to use in a widget, overriding the "cursor-color" and "secondary-cursor-color" style properties. All other style values are left untouched. See also gtk_widget_modify_style(). Note that the underlying properties have the GdkColor type, so the alpha value in primary and secondary will be ignored.