diff --git a/src/mips/psyqo/primitives/lines.hh b/src/mips/psyqo/primitives/lines.hh
index 29e8cef2c..9cd63cfbe 100644
--- a/src/mips/psyqo/primitives/lines.hh
+++ b/src/mips/psyqo/primitives/lines.hh
@@ -46,7 +46,7 @@ struct Line {
     Line(Color c) : command(0x40000000 | c.packed) {}
     Line& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x40000000 | c.packed | wasSemiTrans;
+        command = 0x40000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Line& setOpaque() {
@@ -81,7 +81,7 @@ struct GouraudLine {
     GouraudLine(Color c) : command(0x50000000 | c.packed) {}
     GouraudLine& setColorA(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x50000000 | c.packed | wasSemiTrans;
+        command = 0x50000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     GouraudLine& setColorB(Color c) {
@@ -125,7 +125,7 @@ struct PolyLineBegin {
     PolyLineBegin(Color c) : command(0x48000000 | c.packed) {}
     PolyLineBegin& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x48000000 | c.packed | wasSemiTrans;
+        command = 0x48000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     PolyLineBegin& setOpaque() {
@@ -166,7 +166,7 @@ struct PolyLine {
     PolyLine(Color c) : command(0x48000000 | c.packed) {}
     PolyLine& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x48000000 | c.packed | wasSemiTrans;
+        command = 0x48000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     PolyLine& setOpaque() {
diff --git a/src/mips/psyqo/primitives/quads.hh b/src/mips/psyqo/primitives/quads.hh
index 440dbf404..cb7e552c7 100644
--- a/src/mips/psyqo/primitives/quads.hh
+++ b/src/mips/psyqo/primitives/quads.hh
@@ -54,7 +54,7 @@ struct Quad {
     Quad(Color c) : command(0x28000000 | c.packed) {}
     Quad& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x28000000 | c.packed | wasSemiTrans;
+        command = 0x28000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Quad& setOpaque() {
@@ -109,7 +109,7 @@ struct TexturedQuad {
     TexturedQuad(Color c) : command(0x2c000000 | c.packed) {}
     TexturedQuad& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x2c000000 | c.packed | wasSemiTrans;
+        command = 0x2c000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     TexturedQuad& setOpaque() {
@@ -151,7 +151,7 @@ struct GouraudQuad {
     GouraudQuad(Color c) : command(0x38000000 | c.packed) {}
     GouraudQuad& setColorA(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x38000000 | c.packed | wasSemiTrans;
+        command = 0x38000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     GouraudQuad& setColorB(Color c) {
@@ -205,7 +205,7 @@ struct GouraudQuad {
         GTE::read<GTE::Register::RGB2>(&command);
         GTE::write<GTE::Register::RGB0, GTE::Unsafe>(&b->packed);
         GTE::write<GTE::Register::RGB1, GTE::Unsafe>(&c->packed);
-        GTE::write<GTE::Register::RGB2, GTE::Unsafe>(&d->packed);
+        GTE::write<GTE::Register::RGB2, GTE::Safe>(&d->packed);
         GTE::Kernels::dpct();
         GTE::read<GTE::Register::RGB0>(&colorB.packed);
         GTE::read<GTE::Register::RGB1>(&colorC.packed);
@@ -226,7 +226,7 @@ struct GouraudQuad {
         GTE::read<GTE::Register::RGB2>(&command);
         GTE::write<GTE::Register::RGB0, GTE::Unsafe>(b.packed);
         GTE::write<GTE::Register::RGB1, GTE::Unsafe>(c.packed);
-        GTE::write<GTE::Register::RGB2, GTE::Unsafe>(d.packed);
+        GTE::write<GTE::Register::RGB2, GTE::Safe>(d.packed);
         GTE::Kernels::dpct();
         GTE::read<GTE::Register::RGB0>(&colorB.packed);
         GTE::read<GTE::Register::RGB1>(&colorC.packed);
@@ -267,7 +267,7 @@ struct GouraudTexturedQuad {
     GouraudTexturedQuad(Color c) : command(0x3c000000 | c.packed) {}
     GouraudTexturedQuad& setColorA(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x3c000000 | c.packed | wasSemiTrans;
+        command = 0x3c000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     GouraudTexturedQuad& setColorB(Color c) {
@@ -305,7 +305,7 @@ struct GouraudTexturedQuad {
         GTE::read<GTE::Register::RGB2>(&command);
         GTE::write<GTE::Register::RGB0, GTE::Unsafe>(&b->packed);
         GTE::write<GTE::Register::RGB1, GTE::Unsafe>(&c->packed);
-        GTE::write<GTE::Register::RGB2, GTE::Unsafe>(&d->packed);
+        GTE::write<GTE::Register::RGB2, GTE::Safe>(&d->packed);
         GTE::Kernels::dpct();
         GTE::read<GTE::Register::RGB0>(&colorB.packed);
         GTE::read<GTE::Register::RGB1>(&colorC.packed);
@@ -326,7 +326,7 @@ struct GouraudTexturedQuad {
         GTE::read<GTE::Register::RGB2>(&command);
         GTE::write<GTE::Register::RGB0, GTE::Unsafe>(b.packed);
         GTE::write<GTE::Register::RGB1, GTE::Unsafe>(c.packed);
-        GTE::write<GTE::Register::RGB2, GTE::Unsafe>(d.packed);
+        GTE::write<GTE::Register::RGB2, GTE::Safe>(d.packed);
         GTE::Kernels::dpct();
         GTE::read<GTE::Register::RGB0>(&colorB.packed);
         GTE::read<GTE::Register::RGB1>(&colorC.packed);
diff --git a/src/mips/psyqo/primitives/rectangles.hh b/src/mips/psyqo/primitives/rectangles.hh
index bb28f9e77..aaae9d50f 100644
--- a/src/mips/psyqo/primitives/rectangles.hh
+++ b/src/mips/psyqo/primitives/rectangles.hh
@@ -49,7 +49,7 @@ struct Rectangle {
     Rectangle(Color c) : command(BASE | c.packed) {}
     Rectangle& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = BASE | c.packed | wasSemiTrans;
+        command = BASE | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Rectangle& setOpaque() {
@@ -84,7 +84,7 @@ struct Pixel {
     Pixel(Color c) : command(BASE | c.packed) {}
     Pixel& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = BASE | c.packed | wasSemiTrans;
+        command = BASE | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Pixel& setOpaque() {
@@ -118,7 +118,7 @@ struct Rectangle8x8 {
     Rectangle8x8(Color c) : command(BASE | c.packed) {}
     Rectangle8x8& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = BASE | c.packed | wasSemiTrans;
+        command = BASE | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Rectangle8x8& setOpaque() {
@@ -152,7 +152,7 @@ struct Rectangle16x16 {
     Rectangle16x16(Color c) : command(BASE | c.packed) {}
     Rectangle16x16& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = BASE | c.packed | wasSemiTrans;
+        command = BASE | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Rectangle16x16& setOpaque() {
diff --git a/src/mips/psyqo/primitives/sprites.hh b/src/mips/psyqo/primitives/sprites.hh
index 02fe1674d..22dac4a17 100644
--- a/src/mips/psyqo/primitives/sprites.hh
+++ b/src/mips/psyqo/primitives/sprites.hh
@@ -50,7 +50,7 @@ struct Sprite {
     Sprite(Color c) : command(BASE | c.packed) {}
     Sprite& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = BASE | c.packed | wasSemiTrans;
+        command = BASE | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Sprite& setOpaque() {
@@ -87,7 +87,7 @@ struct Sprite1x1 {
     Sprite1x1(Color c) : command(BASE | c.packed) {}
     Sprite1x1& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = BASE | c.packed | wasSemiTrans;
+        command = BASE | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Sprite1x1& setOpaque() {
@@ -123,7 +123,7 @@ struct Sprite8x8 {
     Sprite8x8(Color c) : command(BASE | c.packed) {}
     Sprite8x8& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = BASE | c.packed | wasSemiTrans;
+        command = BASE | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Sprite8x8& setOpaque() {
@@ -159,7 +159,7 @@ struct Sprite16x16 {
     Sprite16x16(Color c) : command(BASE | c.packed) {}
     Sprite16x16& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = BASE | c.packed | wasSemiTrans;
+        command = BASE | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Sprite16x16& setOpaque() {
diff --git a/src/mips/psyqo/primitives/triangles.hh b/src/mips/psyqo/primitives/triangles.hh
index d5753c7c4..c0fa73a71 100644
--- a/src/mips/psyqo/primitives/triangles.hh
+++ b/src/mips/psyqo/primitives/triangles.hh
@@ -47,7 +47,7 @@ struct Triangle {
     Triangle(Color c) : command(0x20000000 | c.packed) {}
     Triangle& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x20000000 | c.packed | wasSemiTrans;
+        command = 0x20000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     Triangle& setOpaque() {
@@ -98,7 +98,7 @@ struct TexturedTriangle {
     TexturedTriangle(Color c) : command(0x24000000 | c.packed) {}
     TexturedTriangle& setColor(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x24000000 | c.packed | wasSemiTrans;
+        command = 0x24000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     TexturedTriangle& setOpaque() {
@@ -138,7 +138,7 @@ struct GouraudTriangle {
     GouraudTriangle(Color c) : command(0x30000000 | c.packed) {}
     GouraudTriangle& setColorA(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x30000000 | c.packed | wasSemiTrans;
+        command = 0x30000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     GouraudTriangle& setColorB(Color c) {
@@ -235,7 +235,7 @@ struct GouraudTexturedTriangle {
     GouraudTexturedTriangle(Color c) : command(0x34000000 | c.packed) {}
     GouraudTexturedTriangle& setColorA(Color c) {
         uint32_t wasSemiTrans = command & 0x02000000;
-        command = 0x34000000 | c.packed | wasSemiTrans;
+        command = 0x34000000 | (c.packed & 0xffffff) | wasSemiTrans;
         return *this;
     }
     GouraudTexturedTriangle& setColorB(Color c) {