fix rewriterule for css-color-3

Author: Peter Linss

.htaccess

@@ -120,7 +120,7 @@ RewriteRule ^css-backgrounds-3/(.*)$ css-backgrounds/$1
 RewriteRule ^css-box-3/(.*)$ css-box/$1
 RewriteRule ^css-break-3/(.*)$ css-break/$1
 RewriteRule ^css-cascade-3/(.*)$ css-cascade/$1
-RewriteRule ^css-color-3/(.*)$ css-color/$1
+RewriteRule ^css-color-4/(.*)$ css-color/$1
 RewriteRule ^css-color-correction-1/(.*)$ css-color-correction/$1
 RewriteRule ^css-conditional-3/(.*)$ css-conditional/$1
 RewriteRule ^css-content-3/(.*)$ css-content/$1
@@ -174,4 +174,4 @@ RewriteRule ^cssom-view-1/(.*)$ cssom-view/$1
 
 RewriteRule ^selectors-4/(.*)$ selectors/$1
 RewriteRule ^mediaqueries-4/(.*)$ mediaqueries/$1
-#RewriteRule ^css-xxx-n/(.*)$ css-xxx/$1
+#RewriteRule ^css-xxx-n/(.*)$ css-xxx/$1