diff --git a/src/kits/interface/PrivateScreen.cpp b/src/kits/interface/PrivateScreen.cpp
index 99d47380ad..e45db1c0fc 100644
--- a/src/kits/interface/PrivateScreen.cpp
+++ b/src/kits/interface/PrivateScreen.cpp
@@ -237,7 +237,7 @@ BPrivateScreen::IndexForColor(uint8 red, uint8 green, uint8 blue, uint8 alpha)
 		&& alpha == B_TRANSPARENT_COLOR.alpha)
 		return B_TRANSPARENT_8_BIT;
 
-	uint16 index = ((blue & 0xf8) << 7) | ((green & 0xf8) << 2) | (red >> 3);
+	uint16 index = ((red & 0xf8) << 7) | ((green & 0xf8) << 2) | (blue >> 3);
 	if (ColorMap())
 		return fColorMap->index_map[index];