diff --git a/assets/shaders/singleDiffuseLight/singleDiffuseLight_frag.glsl b/assets/shaders/singleDiffuseLight/singleDiffuseLight_frag.glsl
index d1cb398..aed8177 100644
--- a/assets/shaders/singleDiffuseLight/singleDiffuseLight_frag.glsl
+++ b/assets/shaders/singleDiffuseLight/singleDiffuseLight_frag.glsl
@@ -2,16 +2,9 @@
 precision mediump float;
 #endif
 
-// Light color.
-uniform vec3 u_lightColor;
-// Diffuse surface color.
-uniform vec3 u_diffColor;
-// Specular color.
-uniform vec3 u_specColor;
-// Ambient light color.
-uniform vec3 u_ambColor;
+// Fragment color received from the vertex shader.
+varying vec4 v_color;
 
 void main(){
-	// TODO: Implement per pixel diffuse lighting.
-	gl_FragColor = vec4(u_diffColor, 1.0);
+	gl_FragColor = v_color;
 }
diff --git a/assets/shaders/singleDiffuseLight/singleDiffuseLight_vert.glsl b/assets/shaders/singleDiffuseLight/singleDiffuseLight_vert.glsl
index 7098fe7..2a2b274 100644
--- a/assets/shaders/singleDiffuseLight/singleDiffuseLight_vert.glsl
+++ b/assets/shaders/singleDiffuseLight/singleDiffuseLight_vert.glsl
@@ -4,6 +4,13 @@ uniform mat4 u_projTrans;
 // Vertex position in world coordinates.
 attribute vec4 a_position;
 
+// Vertex color.
+attribute vec4 a_color;
+
+// Vertex color to pass to the fragment shader.
+varying vec4 v_color;
+
 void main(){
+	v_color = a_color;
 	gl_Position = u_projTrans * a_position;
 }