added alpha and colorspace to attributes and input pages

files/en-us/web/html/reference/attributes/index.md

@@ -76,6 +76,13 @@ Elements in HTML have **attributes**; these are additional values that configure
       <td>{{ HTMLElement("iframe") }}</td>
       <td>Specifies a feature-policy for the iframe.</td>
     </tr>
+    <tr>
+      <td>
+        <code><a href="/en-US/docs/Web/HTML/Reference/Elements/input/color#alpha">alpha</a></code>
+      </td>
+      <td>{{ HTMLElement("input") }}</td>
+      <td>Allow the user to select a color's opacity on a <code>type="color"</code> input.</td>
+    </tr>
     <tr>
       <td>
         <code><a href="/en-US/docs/Web/HTML/Reference/Attributes/alt">alt</a></code>
@@ -257,6 +264,13 @@ Elements in HTML have **attributes**; these are additional values that configure
         </div>
       </td>
     </tr>
+    <tr>
+      <td>
+        <code><a href="/en-US/docs/Web/HTML/Reference/Elements/input/color#colorspace">colorspace</a></code>
+      </td>
+      <td>{{ HTMLElement("input") }}</td>
+      <td>Defines the <a href="/en-US/docs/Glossary/Color_space">color space</a> that is used by a <code>type="color"</code> input.</td>
+    </tr>
     <tr>
       <td>
         <code><a href="/en-US/docs/Web/HTML/Reference/Elements/textarea#cols">cols</a></code>

files/en-us/web/html/reference/elements/input/index.md

@@ -346,11 +346,13 @@ Attributes for the `<input>` element include the [global HTML attributes](/en-US
 | Attribute                                     | Type(s)                                                                 | Description                                                                            |
 | --------------------------------------------- | ----------------------------------------------------------------------- | -------------------------------------------------------------------------------------- |
 | [`accept`](#accept)                           | `file`                                                                  | Hint for expected file type in file upload controls                                    |
+| [`alpha`](#alpha)                           | `color`                                                                  | Opacity of the color                                   |
 | [`alt`](#alt)                                 | `image`                                                                 | alt attribute for the image type. Required for accessibility                           |
 | [`autocapitalize`](#autocapitalize)           | all except `url`, `email`, and `password`                               | Controls automatic capitalization in inputted text.                                    |
 | [`autocomplete`](#autocomplete)               | all except `checkbox`, `radio`, and buttons                             | Hint for form autofill feature                                                         |
 | [`capture`](#capture)                         | `file`                                                                  | Media capture input method in file upload controls                                     |
 | [`checked`](#checked)                         | `checkbox`, `radio`                                                     | Whether the command or control is checked                                              |
+| [`colorspace`](#colorspace)                         | `color`                                                     | The [color space](/en-US/docs/Glossary/Color_space) that should be used for selecting the color value                                              |
 | [`dirname`](#dirname)                         | `hidden`, `text`, `search`, `url`, `tel`, `email`                       | Name of form field to use for sending the element's directionality in form submission  |
 | [`disabled`](#disabled)                       | all                                                                     | Whether the form control is disabled                                                   |
 | [`form`](#form)                               | all                                                                     | Associates the control with a form element                                             |