Emphasis allows certain parts of a component to be accentuated, or shown with lower contrast to reflect importance / state inside a component. For example, inside a disabled button, text should have an emphasis level of EmphasisLevels.disabled, to show that the button is currently not active / able to be interacted with.
Emphasis works by adjusting the color provided by AmbientContentColor, so that emphasis levels cascade through a subtree without requiring components to be aware of their context.
The default implementations convey emphasis by changing the alpha / opacity of color, to increase / reduce contrast for a particular element.
To set emphasis for a particular subtree, see ProvideEmphasis.
- note that this should not typically be customized, as the default values are optimized for accessibility and contrast on different surfaces.
For more information on emphasis and ensuring legibility for content, see Text legibility
Applies emphasis to the given color.