[Link] Fix color mismatch with Typography component (#19949)

docs/pages/api/link.md

@@ -26,7 +26,7 @@ You can learn more about the difference by [reading this guide](/guides/minimizi
 |:-----|:-----|:--------|:------------|
 | <span class="prop-name required">children&nbsp;*</span> | <span class="prop-type">node</span> |  | The content of the link. |
 | <span class="prop-name">classes</span> | <span class="prop-type">object</span> |  | Override or extend the styles applied to the component. See [CSS API](#css) below for more details. |
-| <span class="prop-name">color</span> | <span class="prop-type">'default'<br>&#124;&nbsp;'error'<br>&#124;&nbsp;'inherit'<br>&#124;&nbsp;'primary'<br>&#124;&nbsp;'secondary'<br>&#124;&nbsp;'textPrimary'<br>&#124;&nbsp;'textSecondary'</span> | <span class="prop-default">'primary'</span> | The color of the link. |
+| <span class="prop-name">color</span> | <span class="prop-type">'initial'<br>&#124;&nbsp;'inherit'<br>&#124;&nbsp;'primary'<br>&#124;&nbsp;'secondary'<br>&#124;&nbsp;'textPrimary'<br>&#124;&nbsp;'textSecondary'<br>&#124;&nbsp;'error'</span> | <span class="prop-default">'primary'</span> | The color of the link. |
 | <span class="prop-name">component</span> | <span class="prop-type">element type</span> | <span class="prop-default">'a'</span> | The component used for the root node. Either a string to use a DOM element or a component.<br>⚠️ [Needs to be able to hold a ref](/guides/composition/#caveat-with-refs). |
 | <span class="prop-name">TypographyClasses</span> | <span class="prop-type">object</span> |  | `classes` prop applied to the [`Typography`](/api/typography/) element. |
 | <span class="prop-name">underline</span> | <span class="prop-type">'none'<br>&#124;&nbsp;'hover'<br>&#124;&nbsp;'always'</span> | <span class="prop-default">'hover'</span> | Controls when the link should have an underline. |

packages/material-ui/src/Link/Link.js

@@ -130,13 +130,13 @@ Link.propTypes = {
    * The color of the link.
    */
   color: PropTypes.oneOf([
-    'default',
-    'error',
+    'initial',
     'inherit',
     'primary',
     'secondary',
     'textPrimary',
     'textSecondary',
+    'error',
   ]),
   /**
    * The component used for the root node.