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With WordPress 6.1, theme developers can style elements with references from other settings.
Theme designs often require consistency in the styles applied to blocks. This can be achieved by setting Styles properties which are inherited by blocks using the inheritance of the CSS cascade. In some cases blocks want to apply settings from Styles to a different property of the block – for example the button element might want to use the global text color for its background color and the global background for its text color.
To solve this problem, themes need to be able to share Styles settings with blocks. This will make it easier for users to update these shared properties across all their blocks. Again, as example for button element the developer wants to use the text color for its background. If the button element is set up as in the example above, then when a user edits the global text color, the background color of their buttons will also be updated, too.