Apply dynamic css styles to drop down list items in Oracle jet

Question

Here is my drop down list

<select id="productselect" aria-label="Single Select"      
        data-bind="ojComponent: {component: 'ojSelect', disabled: false,
                  value: productValue,optionChange: onChangeProduct,
                  rootAttributes: {style:'max-width:20em'}}">
   <!-- ko foreach: products -->
      <option data-bind="value:value, text:label, css:{labelclass:true}">   
      </option>    
   <!-- /ko -->
</select>

I would like to apply different colors to each list item by passing dynamic class, but not working. Please help.

Drop-down should be like

<option style = "color : red" data-bind="value:value, text:label">
<option style = "color : blue" data-bind="value:value, text:label">
and so on...

How to achieve this type of drop-down dynamically.

Answer 1

css binding is not working for above type of select component. I had to go with this type and it is working fine as expected.

<ul id="prods" style="display: none" >
   <!-- ko foreach: prods -->
    <li data-bind="attr: {'oj-data-value': value}, style:
         {color:colorString}">
      <span data-bind="text: label"></span>
   </li>
  <!-- /ko -->
</ul>
<select id="prodselect" name="prod_names"
    data-bind="ojComponent: {component: 'ojSelect', disabled: true,
               renderMode: 'jet',list: 'prods', value: product,
               rootAttributes: {style:'max-width:100%'}}">
</select>

Passing required information from back end through 'prod' data structure.