diff --git a/common/nori/image.go b/common/nori/image.go
index fc485c5..b0fab41 100644
--- a/common/nori/image.go
+++ b/common/nori/image.go
@@ -55,6 +55,9 @@ func (i *Image) Decode(rd *bufio.Reader, palette *PaletteSection) error {
 			if red == 0xff && blue == 0xff {
 				alpha = 0x00
 			}
+			if red == 0x00 && blue == 0x00 && green == 0xff {
+				alpha = 0x00
+			}
 			col := &color.RGBA{
 				red, green, blue,
 				alpha,
@@ -75,6 +78,10 @@ func (i *Image) Decode(rd *bufio.Reader, palette *PaletteSection) error {
 				rgb[0], rgb[1], rgb[2],
 				alpha,
 			}
+
+			if rgb[0] == 0x00 && rgb[1] == 0xff && rgb[2] == 0x00 {
+				alpha = 0x00
+			}
 			if rgb[0] == 0xff && rgb[2] == 0xff {
 				alpha = 0x00
 			}
diff --git a/common/nori/nori_test/palette.apng b/common/nori/nori_test/palette.apng
index 76b14be..bbd7a8a 100755
Binary files a/common/nori/nori_test/palette.apng and b/common/nori/nori_test/palette.apng differ
diff --git a/common/nori/reader.go b/common/nori/reader.go
index 418fe0b..084a21d 100644
--- a/common/nori/reader.go
+++ b/common/nori/reader.go
@@ -157,9 +157,16 @@ func (n *Reader) decodePalette() error {
 		if err != nil {
 			return err
 		}
+		alpha := uint8(0xff)
+		if rgb[0] == 0x00 && rgb[1] == 0xff && rgb[2] == 0x00 {
+			alpha = 0x00
+		}
+		if rgb[0] == 0xff && rgb[2] == 0xff {
+			alpha = 0x00
+		}
 		cp.Palette[i] = &color.RGBA{
 			rgb[0], rgb[1], rgb[2],
-			0xff,
+			alpha,
 		}
 	}