diff --git a/bashcols b/bashcols
index fb0adc1..8dddbfe 100755
--- a/bashcols
+++ b/bashcols
@@ -2,6 +2,15 @@
 
 reset_esc='\e[0m'
 
+# bgcol <color> <command>
+# Use the specified color as background
+function bgcol {
+	_bashcols_bgcol_conditionalsuffix=bg
+	"$@"
+	_bashcols_bgcol_conditionalsuffix=
+}
+
+
 # applies the given color id, executes the command, then resets the color
 function colout() {
 	if [[ $# -eq 0 ]]; then
@@ -11,7 +20,11 @@ function colout() {
 
 	local color="$1"
 	shift
-	tput setaf "$color"
+	if [[ -z $_bashcols_bgcol_conditionalsuffix ]]; then
+		tput setaf "$color"
+	else
+		tput setab "$color"
+	fi
 	"$@"
 	tput sgr0
 }
@@ -39,8 +52,8 @@ function dispcollist() {
 	local idx=0
 	for colid in {1..256}; do
 		colout $colid printf "%3s " $colid
-		idx=$(($idx+1))	
-		if [[ $(($idx % $width)) -eq 0 ]]; then
+		let "idx++" || true
+		if ! (( $idx % $width )); then
 			printf "\n"
 		fi
 	done
@@ -49,7 +62,7 @@ function dispcollist() {
 function colthis {
 	local name="$1"
 	shift
-	eval "printf \"%s\" \"\${${name}_esc}$@$reset_esc\""
+	eval "printf \"%s\" \"\${${name}_esc${_bashcols_bgcol_conditionalsuffix}}$@$reset_esc\""
 }
 
 # default colors
@@ -70,3 +83,5 @@ defcol cyanl    14
 defcol whitel   15
 defcol black    16
 
+_bashlib_bashcols=1
+
diff --git a/bashparam b/bashparam
index 4aabd61..41a4e08 100644
--- a/bashparam
+++ b/bashparam
@@ -1,4 +1,4 @@
-#!/usr/bin/bash
+#!/hint/bash
 
 declare -A __params
 
@@ -20,3 +20,4 @@ function set_param {
 }
 
 
+_bashlib_bashparam=1