diff --git a/engines/sci/graphics/palette.cpp b/engines/sci/graphics/palette.cpp
index 76b2ed5..be00d21 100644
--- a/engines/sci/graphics/palette.cpp
+++ b/engines/sci/graphics/palette.cpp
@@ -192,6 +192,15 @@ void GfxPalette::modifyAmigaPalette(byte *data) {
 	_screen->setPalette(&_sysPalette);
 }
 
+static byte gammaBlend(byte c1, byte c2) {
+	double t = 0.5 + (pow (c1/255.0, 2.2/1.0) * 255.0) + 0.5 + (pow (c2/255.0, 2.2/1.0) * 255.0);
+	return static_cast<byte>(0.5 + (pow (0.5*t/255.0, 1.0/2.2) * 255.0));
+}
+
+static byte linearBlend(byte c1, byte c2) {
+	return (c1/2+c2/2)+(c1&1+c2&1)/2;
+}
+
 void GfxPalette::setEGA() {
 	int curColor;
 	byte color1, color2;
@@ -219,9 +228,16 @@ void GfxPalette::setEGA() {
 	for (curColor = 0x10; curColor <= 0xFE; curColor++) {
 		_sysPalette.colors[curColor].used = 1;
 		color1 = curColor & 0x0F; color2 = curColor >> 4;
-		_sysPalette.colors[curColor].r = (_sysPalette.colors[color1].r >> 1) + (_sysPalette.colors[color2].r >> 1);
-		_sysPalette.colors[curColor].g = (_sysPalette.colors[color1].g >> 1) + (_sysPalette.colors[color2].g >> 1);
-		_sysPalette.colors[curColor].b = (_sysPalette.colors[color1].b >> 1) + (_sysPalette.colors[color2].b >> 1);
+
+#if 1
+		_sysPalette.colors[curColor].r = gammaBlend(_sysPalette.colors[color1].r, _sysPalette.colors[color2].r);
+		_sysPalette.colors[curColor].g = gammaBlend(_sysPalette.colors[color1].g, _sysPalette.colors[color2].g);
+		_sysPalette.colors[curColor].b = gammaBlend(_sysPalette.colors[color1].b, _sysPalette.colors[color2].b);
+#else
+		_sysPalette.colors[curColor].r = linearBlend(_sysPalette.colors[color1].r, _sysPalette.colors[color2].r);
+		_sysPalette.colors[curColor].g = linearBlend(_sysPalette.colors[color1].g, _sysPalette.colors[color2].g);
+		_sysPalette.colors[curColor].b = linearBlend(_sysPalette.colors[color1].b, _sysPalette.colors[color2].b);
+#endif
 	}
 	_sysPalette.timestamp = 1;
 	setOnScreen();