Added new kb article map-kb-customize-marker-colors

Author: KB Bot

knowledge-base/map-kb-customize-marker-colors.md

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+---
+title: How to Customize Map Marker Colors in Blazor Applications
+description: Learn how to customize the appearance of map markers by setting and changing their colors in a Blazor application.
+type: how-to
+page_title: How to Customize Map Marker Colors in Blazor Applications
+slug: map-kb-customize-marker-colors
+tags: map, markers
+res_type: kb
+ticketid: 1675518
+---
+
+## Description
+
+When integrating a [Map for Blazor](slug://components/map/layers), you might want to customize the appearance of your map markers to differentiate them or match your application's theme. This knowledge base article also answers the following questions:
+
+- How can I set the color of a map marker in Blazor?
+- How to change the color of specific map markers based on their titles?
+- How to apply custom styles to map markers in a Blazor application?
+
+## Environment
+
+<table>
+    <tbody>
+        <tr>
+            <td>Product</td>
+            <td>Map for Blazor</td>
+        </tr>
+    </tbody>
+</table>
+
+## Solution
+
+To customize the color of map markers in a Blazor application, you can [override the default theme styles](slug://themes-override).
+
+### Change the Color to All Map Markers
+
+To change the color for all markers use the following CSS approach:
+
+<div class="skip-repl"></div>
+````RAZOR
+<TelerikMap Class="my-map">
+    <!-- Map configuration -->
+</TelerikMap>
+
+<style>
+    .my-map.k-map .k-marker {
+        color: blue;
+    }
+</style>
+````
+
+### Customizing Specific Markers
+
+To change the color of specific markers, target them based on their titles using CSS. Check the runnable example below:
+
+````RAZOR
+<TelerikMap Center="@Center" Zoom="3" Class="my-map">
+    <MapLayers>
+        <MapLayer Type="@MapLayersType.Marker"
+                  Data="@MarkerData1"
+                  LocationField="@nameof(MarkerModel.LatLng)"
+                  TitleField="@nameof(MarkerModel.Title)">
+        </MapLayer>
+        <MapLayer Type="@MapLayersType.Tile"
+                  Attribution="@Attribution"
+                  Subdomains="@Subdomains"
+                  UrlTemplate="@UrlTemplate">
+        </MapLayer>
+        <MapLayer Type="@MapLayersType.Marker"
+                  Data="@MarkerData2"
+                  LocationField="@nameof(MarkerModel.LatLng)"
+                  TitleField="@nameof(MarkerModel.Title)">
+        </MapLayer>
+    </MapLayers>
+</TelerikMap>
+
+<style>
+    .my-map .k-marker[title="San Francisco, CA"] {
+        color: blue;
+    }
+
+    .my-map .k-marker[title="Austin, TX"] {
+        color: green;
+    }
+</style>
+
+@code {
+    private string[] Subdomains { get; set; } = new string[] { "a", "b", "c" };
+    private string UrlTemplate { get; set; } = "https://#= subdomain #.tile.openstreetmap.org/#= zoom #/#= x #/#= y #.png";
+    private string Attribution { get; set; } = "&copy; <a href='https://osm.org/copyright'>OpenStreetMap contributors</a>";
+    private double[] Center { get; set; } = new double[] { 30.268107, -97.744821 };
+
+    private List<MarkerModel> MarkerData1 { get; set; } = new List<MarkerModel>()
+    {
+        new MarkerModel()
+        {
+            LatLng = new double[] { 30.268107, -97.744821 },
+            Title = "Austin, TX"
+        }
+    };
+
+    private List<MarkerModel> MarkerData2 { get; set; } = new List<MarkerModel>()
+    {
+        new MarkerModel()
+        {
+            LatLng = new double[] { 37.7749, -122.4194 },
+            Title = "San Francisco, CA"
+        }
+    };
+
+    public class MarkerModel
+    {
+        public double[] LatLng { get; set; }
+        public string Title { get; set; } = null!;
+    }
+}
+````
+
+## See Also
+
+- [Override Theme Styles](slug://themes-override)
+- [Map - Marker Layer](slug://components/map/layers/marker)