diff --git a/include/Spectre/Graphics/PixelFormat.h b/include/Spectre/Graphics/PixelFormat.h
index 8eda43d..b2a1ac4 100644
--- a/include/Spectre/Graphics/PixelFormat.h
+++ b/include/Spectre/Graphics/PixelFormat.h
@@ -6,8 +6,8 @@ namespace sp {
 enum PixelFormat
 {
 	PF_Unknown	= 0,
-	PF_RGB		= 1,
-	PF_RGBA		= 2,
+	PF_RGB		= 1,	// Standard RGB: 24 bits per pixel, 8 bits are used for red, green, blue.
+	PF_RGBA		= 2,	// Standard RGBA: 32 bits per pixel, 8 bits are used for red, green, blue, alpha.
 	PF_32BGR	= 3,	// 32 bits per pixel, 8 bits are used for blue, green, red. Last 8 bits are unused.
 	PF_32BGRA	= 4,	// 32 bits per pixel, 8 bits are used for blue, green, red, alpha.
 	PF_Alpha	= 5,	// 8 bit alpha channel.