diff --git a/config.def.h b/config.def.h
index 53119b4..8a27b30 100644
--- a/config.def.h
+++ b/config.def.h
@@ -8,8 +8,9 @@ static bool hide_vacant = false;
 #define TAGSLEN 9
 static char *tags[TAGSLEN] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
 
-// set colors for bar
-// TODO: explain the formatting? or at least how a hex color code would be translated
+// set 16-bit colors for bar
+// 8-bit color can be converted to 16-bit color by simply duplicating values e.g
+// 0x55 -> 0x5555, 0xf1 -> 0xf1f1
 static pixman_color_t activecolor = { .red = 0x0000, .green = 0x5555, .blue = 0x7777, .alpha = 0xffff, };
 static pixman_color_t inactivecolor = { .red = 0x2222, .green = 0x2222, .blue = 0x2222, .alpha = 0xffff, };
 static pixman_color_t textcolor = { .red = 0xeeee, .green = 0xeeee, .blue = 0xeeee, .alpha = 0xffff, };