diff --git a/include/PICA/pica_frag_config.hpp b/include/PICA/pica_frag_config.hpp
index 337fd211..5d5f8420 100644
--- a/include/PICA/pica_frag_config.hpp
+++ b/include/PICA/pica_frag_config.hpp
@@ -35,9 +35,6 @@ namespace PICA {
 
 			BitField<0, 3, FogMode> mode;
 			BitField<3, 1, u32> flipDepth;
-			BitField<8, 8, u32> fogColorR;
-			BitField<16, 8, u32> fogColorG;
-			BitField<24, 8, u32> fogColorB;
 		};
 	};
 
@@ -238,9 +235,6 @@ namespace PICA {
 
 			if (fogConfig.mode == FogMode::Fog) {
 				fogConfig.flipDepth = Helpers::getBit<16>(regs[InternalRegs::TexEnvUpdateBuffer]);
-				fogConfig.fogColorR = Helpers::getBits<0, 8>(regs[InternalRegs::FogColor]);
-				fogConfig.fogColorG = Helpers::getBits<8, 8>(regs[InternalRegs::FogColor]);
-				fogConfig.fogColorB = Helpers::getBits<16, 8>(regs[InternalRegs::FogColor]);
 			}
 		}
 	};
diff --git a/include/PICA/pica_frag_uniforms.hpp b/include/PICA/pica_frag_uniforms.hpp
index 09722d61..781fdcd3 100644
--- a/include/PICA/pica_frag_uniforms.hpp
+++ b/include/PICA/pica_frag_uniforms.hpp
@@ -34,8 +34,10 @@ namespace PICA {
 		alignas(16) vec4 tevBufferColor;
 		alignas(16) vec4 clipCoords;
 
-		// Note: We upload this as a u32 and decode on GPU
+		// Note: We upload these as a u32 and decode on GPU.
+		// Particularly the fog colour since fog is really uncommon and it doesn't matter if we decode on GPU.
 		u32 globalAmbientLight;
+		u32 fogColor;
 		// NOTE: THIS MUST BE LAST so that if lighting is disabled we can potentially omit uploading it
 		LightUniform lightUniforms[8];
 	};
diff --git a/src/core/PICA/shader_gen_glsl.cpp b/src/core/PICA/shader_gen_glsl.cpp
index 1db239f9..41b33d88 100644
--- a/src/core/PICA/shader_gen_glsl.cpp
+++ b/src/core/PICA/shader_gen_glsl.cpp
@@ -27,6 +27,7 @@ static constexpr const char* uniformDefinition = R"(
 
 		// Note: We upload this as a u32 and decode on GPU
 		uint globalAmbientLight;
+		uint inFogColor;
 		LightSource lightSources[8];
 	};
 )";
@@ -656,10 +657,6 @@ void FragmentGenerator::compileFog(std::string& shader, const PICA::FragmentConf
 		return;
 	}
 
-	float r = config.fogConfig.fogColorR / 255.0f;
-	float g = config.fogConfig.fogColorG / 255.0f;
-	float b = config.fogConfig.fogColorB / 255.0f;
-
 	if (config.fogConfig.flipDepth) {
 		shader += "float fog_index = (1.0 - depth) * 128.0;\n";
 	} else {
@@ -668,7 +665,7 @@ void FragmentGenerator::compileFog(std::string& shader, const PICA::FragmentConf
 
 	shader += "float clamped_index = clamp(floor(fog_index), 0.0, 127.0);";
 	shader += "float delta = fog_index - clamped_index;";
-	shader += "vec3 fog_color = vec3(" + std::to_string(r) + ", " + std::to_string(g) + ", " + std::to_string(b) + ");";
+	shader += "vec3 fog_color = (1.0 / 255.0) * vec3(float(inFogColor & 0xffu), float((inFogColor >> 8u) & 0xffu), float((inFogColor >> 16u) & 0xffu));";
 	shader += "vec2 value = texelFetch(u_tex_luts, ivec2(int(clamped_index), 24), 0).rg;"; // fog LUT is past the light LUTs
 	shader += "float fog_factor = clamp(value.r + value.g * delta, 0.0, 1.0);";
 	shader += "combinerOutput.rgb = mix(fog_color, combinerOutput.rgb, fog_factor);";
diff --git a/src/core/renderer_gl/renderer_gl.cpp b/src/core/renderer_gl/renderer_gl.cpp
index c513a186..f8fc31e7 100644
--- a/src/core/renderer_gl/renderer_gl.cpp
+++ b/src/core/renderer_gl/renderer_gl.cpp
@@ -903,6 +903,8 @@ OpenGL::Program& RendererGL::getSpecializedShader() {
 		vec[3] = float((color >> 24) & 0xFF) / 255.0f;
 	}
 
+	uniforms.fogColor = regs[PICA::InternalRegs::FogColor];
+
 	// Append lighting uniforms
 	if (fsConfig.lighting.enable) {
 		uniforms.globalAmbientLight = regs[InternalRegs::LightGlobalAmbient];