Fix themes images (SharePoint#1888)

* Fix themes images

* Adjusting width

* Update themes-colors.md

Author: Linda-Editor

docs/design/themes-colors.md

@@ -21,7 +21,7 @@ Neutral colors recede into the background to let our products shine. They allow
 <br/> 
 <table>
 <tr>
-<td rowspan="13" style=""><img src="../images/sharepoint-neutral-greys.png" alt="Neutral greys"height=766 width=375></img></td>
+<td rowspan="13" style=""><img src="../images/sharepoint-neutral-greys.png" alt="Neutral greys" height="766" width="375"></img></td>
 <td style="color:white; background-color:#000000">black: #000000</td>
 </tr>
 <tr>
@@ -71,7 +71,7 @@ After you select a color, light and dark shades of the accent color are created
 
 <table>
 <tr>
-<td rowspan="9" style=""><img src="../images/sharepoint-theme-primary.png" alt="Theme primary colors"height=531 width=375></img></td>
+<td rowspan="9" style=""><img src="../images/sharepoint-theme-primary.png" alt="Theme primary colors" height="531" width="375"></img></td>
 <td style="color:white; background-color:#004578">themeDarker: #004578</td>
 </tr>
 <tr>