Merge pull request #877 from a1mery/spo-apply-site-theme

New script sample to apply a theme to a SharePoint site

Author: pkbullock

scripts/spo-apply-site-theme/README.md

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+
+
+# Apply site theme
+
+## Summary
+
+Apply a theme to a specific SharePoint site without adding a tenant theme that would be available for all sites through the "Change the look" menu.
+
+![Example Screenshot](assets/preview.png)
+
+
+# [PnP PowerShell](#tab/pnpps)
+
+```powershell
+
+$siteUrl = "https://contoso.sharepoint.com/sites/DemoSite"
+
+$themePalette = @{
+    "palette" = @{
+        "themePrimary"= "#1BF242";
+        "themeLighterAlt"= "#0d0b00";
+        "themeLighter"= "#0b35bc";
+        "themeLight"= "#322d00";
+        "themeTertiary"= "#6a5f00";
+       "themeSecondary"= "#1B22F2";
+        "themeDarkAlt"= "#ffe817";
+        "themeDark"= "#ffed4b";
+        "themeDarker"= "#fff171";
+        "neutralLighterAlt"= "#252525";
+        "neutralLighter"= "#282828";
+        "neutralLight"= "#313131";
+        "neutralQuaternaryAlt"= "#3f3f3f";
+        "neutralQuaternary"= "#484848";
+        "neutralTertiaryAlt"= "#4f4f4f";
+        "neutralTertiary"= "#c8c8c8";
+        "neutralSecondaryAlt"= "#d0d0d0";
+        "neutralSecondary"= "#dadada";
+        "neutralPrimary"= "#ffffff";
+        "neutralDark"= "#eaeaea";
+        "black"= "#f8f8f8";
+        "white"= "#1f1f1f";
+        "primaryBackground"= "#1f1f1f";
+        "primaryText"= "#ffffff";
+        "error"= "#ff5f5f"
+    }
+}
+
+Connect-PnPOnline -Url $siteUrl -ClientId "" -Interactive
+
+$accessToken = Get-PnPAccessToken -ResourceTypeName SharePoint
+$bodyObject = @{
+    name      = "Sample theme"
+    themeJson = ($themePalette | ConvertTo-Json -Depth 10 -Compress)
+}
+
+$bodyJson = $bodyObject | ConvertTo-Json -Depth 10
+
+$headers = @{
+    "Authorization" = "Bearer $accessToken"
+    "Accept"        = "application/json;odata.metadata=minimal"
+    "Content-type"  = "application/json; charset=utf-8"
+    "ODATA-VERSION" = "4.0"
+}
+
+$uri = "$siteUrl/_api/thememanager/Applytheme"
+
+Invoke-RestMethod -Method POST -Uri $uri -Headers $headers -Body $bodyJson
+
+Disconnect-PnPOnline
+
+```
+[!INCLUDE [More about PnP PowerShell](../../docfx/includes/MORE-PNPPS.md)]
+
+
+***
+
+## Contributors
+
+| Author(s) |
+|-----------|
+| [Aimery Thomas](https://github.com/a1mery)|
+
+[!INCLUDE [DISCLAIMER](../../docfx/includes/DISCLAIMER.md)]
+<img src="https://m365-visitor-stats.azurewebsites.net/script-samples/scripts/spo-apply-site-theme" aria-hidden="true" />

scripts/spo-apply-site-theme/assets/example.png

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+[
+  {
+    "name": "spo-apply-site-theme",
+    "source": "pnp",
+    "title": "Apply site theme",
+    "shortDescription": "Apply a theme to a specific SharePoint site without adding a tenant theme that would be available for all sites.",
+    "url": "https://pnp.github.io/script-samples/spo-apply-site-theme/README.html",
+    "longDescription": [
+      "Apply a theme to a specific SharePoint site without adding a tenant theme that would be available for all sites through the 'Change the look' menu."
+    ],
+    "creationDateTime": "2025-10-22",
+    "updateDateTime": "2025-10-22",
+    "products": [
+      "SharePoint"
+    ],
+    "metadata": [
+      {
+        "key": "PNP-POWERSHELL",
+        "value": "3.1.0"
+      }
+    ],
+    "categories": [
+      "Configure"
+    ],
+    "tags": [
+      "Connect-PnPOnline",
+      "Get-PnPAccessToken",
+      "Invoke-RestMethod",
+      "Disconnect-PnPOnline"
+    ],
+    "thumbnails": [
+      {
+        "type": "image",
+        "order": 100,
+        "url": "https://raw.githubusercontent.com/pnp/script-samples/main/scripts/spo-apply-site-theme/assets/preview.png",
+        "alt": "Preview of Apply site theme script"
+      }
+    ],
+    "authors": [
+      {
+        "gitHubAccount": "a1mery",
+        "pictureUrl": "https://github.com/a1mery.png",
+        "name": "Aimery Thomas"
+      }
+    ],
+    "references": [
+      {
+        "name": "Want to learn more about PnP PowerShell and the cmdlets",
+        "description": "Check out the PnP PowerShell site to get started and for the reference to the cmdlets.",
+        "url": "https://aka.ms/pnp/powershell"
+      }
+    ]
+  }
+]