diff --git a/docs/config.rst b/docs/config.rst
index 9078d99..1e8ecb9 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -23,9 +23,13 @@ Example:
         "localhost:8080",
         "127.0.0.1:8080"
       ],
-      "formatQuality": {
-        "jpeg": 80,
-        "webp": 90
+      "formatOptions": {
+        "jpeg": {
+          "quality": 80
+        },
+        "webp": {
+          "quality": 90
+        }
       },
       "maxScaleFactor": 3,
       "maxSize": 2048,
@@ -85,10 +89,23 @@ Path to the html (relative to ``root`` path) to use as a front page.
 Use ``true`` (or nothing) to serve the default TileServer GL front page with list of styles and data.
 Use ``false`` to disable the front page altogether (404).
 
-``formatQuality``
+``formatOptions``
 -----------------
 
-Quality of the compression of individual image formats. [0-100]
+You can use this to specify options for the generation of images in the supported file formats.
+For JPEG and WebP, the only supported option is ``quality`` [0-100].
+For PNG, the full set of options `exposed by the sharp library <https://sharp.pixelplumbing.com/api-output#png>`_ is available, except ``force`` and ``colours`` (use ``colors``). If not set, their values are the defaults from ``sharp``.
+
+For example::
+
+  "formatOptions": {
+    "png": {
+      "palette": true,
+      "colors": 4
+    }
+  }
+
+Note: ``formatOptions`` replaced the ``formatQuality`` option in previous versions of TileServer GL. 
 
 ``maxScaleFactor``
 -----------
diff --git a/src/serve_rendered.js b/src/serve_rendered.js
index a159997..2043ce3 100644
--- a/src/serve_rendered.js
+++ b/src/serve_rendered.js
@@ -504,14 +504,32 @@ const respondImage = (
         image.composite(composites);
       }
 
-      const formatQuality = (options.formatQuality || {})[format];
+      // Legacy formatQuality is deprecated but still works
+      const formatQualities = options.formatQuality || {};
+      if (Object.keys(formatQualities).length !== 0) {
+        console.log(
+          'WARNING: The formatQuality option is deprecated and has been replaced with formatOptions. Please see the documentation. The values from formatQuality will be used if a quality setting is not provided via formatOptions.',
+        );
+      }
+      const formatQuality = formatQualities[format];
+
+      const formatOptions = (options.formatOptions || {})[format] || {};
 
       if (format === 'png') {
-        image.png({ adaptiveFiltering: false });
+        image.png({
+          progressive: formatOptions.progressive,
+          compressionLevel: formatOptions.compressionLevel,
+          adaptiveFiltering: formatOptions.adaptiveFiltering,
+          palette: formatOptions.palette,
+          quality: formatOptions.quality,
+          effort: formatOptions.effort,
+          colors: formatOptions.colors,
+          dither: formatOptions.dither,
+        });
       } else if (format === 'jpeg') {
-        image.jpeg({ quality: formatQuality || 80 });
+        image.jpeg({ quality: formatOptions.quality || formatQuality || 80 });
       } else if (format === 'webp') {
-        image.webp({ quality: formatQuality || 90 });
+        image.webp({ quality: formatOptions.quality || formatQuality || 90 });
       }
       image.toBuffer((err, buffer, info) => {
         if (!buffer) {