diff --git a/src/main/java/qupath/lib/images/servers/omero/OmeroWebImageServer.java b/src/main/java/qupath/lib/images/servers/omero/OmeroWebImageServer.java
index a04ff6e..9477103 100644
--- a/src/main/java/qupath/lib/images/servers/omero/OmeroWebImageServer.java
+++ b/src/main/java/qupath/lib/images/servers/omero/OmeroWebImageServer.java
@@ -313,7 +313,7 @@ else if (map.has("channels")) {
 //				.args(args)
 				.name(imageName)
 				.pixelType(pixelType)
-				.rgb(isRGB)
+				.rgb(isRGB || (sizeC == 3 && pixelType == PixelType.UINT8))
 				.magnification(magnification)
 				.levels(levelBuilder.build());