Coloring will likely need to be done with CSS code. 

Example for coloring the quantity:

1. In WebSiteX5, under "3 Sitemap", scroll all the way down to the special pages.

2. Select "Online Shop: Search". Then click "Properties" at the top and then the "Advanced" tab.

3. Paste the CSS code here:

    Custom Code

    Before the closing HEAD tag

       <style>
       #im-products .im-cc-products-card input.im-cc-products-qty {
       background-color: yellow !important;
       color: red !important;
       }
       </style>

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Coloring the product catalog selection:

In WebSiteX5, under "3 Sitemap", select the product catalog page and click "Properties" at the top, then click the "Advanced" tab. Paste the CSS code here:

   Custom Code

   Before the closing HEAD tag

      <style>
      #imProductList_110_02 .im-cc-products-card select {
      background-color: yellow !important;
      color: red !important;
      }
     </style>

Important note:

The numbers 110_02 vary from website to website and from product catalog to product catalog and must be determined in the source code for the respective product catalog.

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If further color changes to the selection options in the shop are desired, the CSS experts would have to look for solutions.