In the Graphic Styles panel, you can rename or delete graphic styles, break the link to a graphic style, and replace graphic style attributes.
Any objects, groups, or layers that used the graphic style retain the same appearance attributes; however, these attributes are no longer associated with a graphic style.
Choose Break Link To Graphic Style from
the Graphic Styles panel menu, or click the Break Link To Graphic
Style button in
the panel.
Change any appearance attribute of the selection (such as a fill, stroke, transparency, or effect).
The object, group, or layer retains the same appearance attributes and is now independently editable. However, these attributes are no longer associated with a graphic style.