docs-bug(multiple): are color variants still supported?

[json-derulo]

Documentation Feedback

In v18, there used to be a section in the theming guide about creating custom color variants: https://v18.material.angular.io/guide/theming#using-component-color-variants

In v19, this section is gone. The problem is that in various component's API docs, such as button, there is still a link to this section: https://material.angular.io/components/button/api

So is this approach still supported? If yes, please bring back the section to the theming guide so the links work again. If not, please remove the link and guide to an alternative solution.

Affected documentation page

https://material.angular.io/guide/theming#using-component-color-variants

[benelliott]

To add to this, if that documentation was intentionally removed, it would be nice to restore some of it (including the class examples) to the M2-M3 migration docs (https://material.angular.io/guide/material-2-theming#optional-add-backwards-compatibility-styles-for-color-variants). Currently they just state

We recommend not relying on the color="primary", color="accent", or color="warn" options that are offered by a number of Angular Material components for M2 themes.

Without saying what to do instead (i.e. the class/mixin approach).

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