diff --git a/thebookofcolors b/thebookofcolors
index 2c6f579..17912ff 100755
--- a/thebookofcolors
+++ b/thebookofcolors
@@ -140,9 +140,10 @@ section_bold_colors() {
 }
 
 section_background_colors() {
-	title "Codes 40-47; Regular Background Colors"
+	title "Codes 40-47; Background Colors"
 
-	printf 'TODO\n'
+	printf "Codes 40 through 47 are used to set the background color, as opposed to 30-37 being used to set the foreground (i.e. text) color.\n"
+	printf "40 through 47 select from the same eight-color palette as codes 30 through 37. Whether the \"boldness\" attribute will set the background color to the alternate \"bright\" color is implementation-dependent; both are shown here so you can see whether your terminal supports it.\n"
 }
 
 section_256_colors() {