Taken from ng-select Documentation page

The backgrond color and text color of the highlighted option in the drop-down can be changed using the highlightColor and highlightTextColor properties, as shown in the following example. Single select

Component template

<ng-select
    highlightColor="#9575cd"
    highlightTextColor="#fff"
    [options]="characters">
</ng-select>

Multiple select

Component template

<ng-select
    highlightColor="#9575cd"
    highlightTextColor="#fff"
    [options]="characters"
    [multiple]="true">
</ng-select>

Taken from ng-select Documentation page

The backgrond color and text color of the highlighted option in the drop-down can be changed using the highlightColor and highlightTextColor properties, as shown in the following example. Single select

Component template

<ng-select
    highlightColor="#9575cd"
    highlightTextColor="#fff"
    [options]="characters">
</ng-select>

Multiple select

Component template

<ng-select
    highlightColor="#9575cd"
    highlightTextColor="#fff"
    [options]="characters"
    [multiple]="true">
</ng-select>

Taken from here

Highlight color The backgrond color and text color of the highlighted option in the drop-down can be changed using the highlightColor and highlightTextColor properties, as shown in the following example.

Single select

Component template

<ng-select
    highlightColor="#9575cd"
    highlightTextColor="#fff"
    [options]="characters">
</ng-select>

Multiple select

Component template

<ng-select
    highlightColor="#9575cd"
    highlightTextColor="#fff"
    [options]="characters"
    [multiple]="true">
</ng-select>

Taken from ng-select Documentation page

The backgrond color and text color of the highlighted option in the drop-down can be changed using the highlightColor and highlightTextColor properties, as shown in the following example. Single select

Component template

<ng-select
    highlightColor="#9575cd"
    highlightTextColor="#fff"
    [options]="characters">
</ng-select>

Multiple select

Component template

<ng-select
    highlightColor="#9575cd"
    highlightTextColor="#fff"
    [options]="characters"
    [multiple]="true">
</ng-select>