h3><a class="self-link" href="#type-checking" aria-label="Permalink for Section 9.2"></a></div>
  <p>Just as with “normal” types for tokens, using a custom, composite type will allow tools to check that the values you use match the expected type. In our color pair example above, attempting to do the following would be invalid and tools should ignore the token and show an error to the user, since “Comic Sans MS” is not a valid color value.</p>
  <aside class="example" id="example-invalid-type"><div c