G183: fix link (w3c#4527)

Correct link to SC 2.4.7.

Co-authored-by: Patrick H. Lauke <[email protected]>
Co-authored-by: Mike Gower <[email protected]>

Author: 3 people

techniques/general/G183.html

@@ -6,7 +6,7 @@
       <p>Colored text when color alone is used to convey information such as words that are links in a paragraph</p>
    </section><section id="description"><h2>Description</h2>
       <p>The intent of this technique is to provide a redundant visual cue for users who may not be able to discern a difference in text color. Color (generally defined as a combination of hue, saturation and luminance) is commonly used to indicate words that are links within a paragraph or other block of text. For example, scattered words in text may be hypertext links that are identified only by a difference in color with surrounding text. This technique describes a way to provide a difference in contrast rather than relying on hue.</p>
-      <p>To meet Success Criterion 1.4.1: Use of Color a <a>relative luminance</a> (lightness) difference of 3:1 or greater with the text around can be used. This technique goes beyond the success criterion and asks for visual highlights when the user hovers over each link, such as an underline, a change in font style such as bold or italics, or an increase in font size. Such a hover effect provides confirmation to pointer users that the text is a link, similar to how the link alters its appearance for keyboard users when it receives focus, in order to meet <a href="sensory-characteristics">2.4.7 Focus Visible</a>.</p>
+      <p>To meet Success Criterion 1.4.1: Use of Color a <a>relative luminance</a> (lightness) difference of 3:1 or greater with the text around can be used. This technique goes beyond the success criterion and asks for visual highlights when the user hovers over each link, such as an underline, a change in font style such as bold or italics, or an increase in font size. Such a hover effect provides confirmation to pointer users that the text is a link, similar to how the link alters its appearance for keyboard users when it receives focus, in order to meet <a href="../../Understanding/focus-visible">2.4.7 Focus Visible</a>.</p>
       <p>While using this technique is sufficient to meet this success criterion, it is not the preferred technique to differentiate link text. This is because links that use the relative luminance of color alone may not be obvious to people with low vision. If there are not a large number of links in the block of text, underlines are recommended for links in blocks of text.</p>
       <div class="note">
          <p>This technique is about the use of color in addition to luminosity. In this technique, the contrast ratio refers to the contrast between a link and the words around it. In Success Criteria 1.4.3 and 1.4.6, contrast ratio refers to the contrast between a word and its background. The difference is that  this technique is about the ability for users to tell the difference (a noticeable difference) between different pieces of text whereas the contrast ratio used in Success Criteria 1.4.3 and 1.4.6 is about the readability of the text with its background for different color and vision disabilities.</p>