diff --git a/aircon.sh b/aircon.sh
index c365955..f428bf8 100755
--- a/aircon.sh
+++ b/aircon.sh
@@ -878,6 +878,8 @@ function processtimeconditions() {
     local this_human
     local keepgoing=0
     local ok=0
+    local nonmatches=0
+    local rv
     if [[ $1 == "-c" ]]; then
         keepgoing=1
         shift 1
@@ -960,6 +962,7 @@ function processtimeconditions() {
                                     ok=1
                             fi
                     fi
+                    [[ $ok -eq 0 ]] && nonmatches=$((nonmatches + 1))
                     [[ $db -eq 1 && $ok -eq 0 ]] && info "   $nowh isn't in range $cond"
                     [[ $db -eq 1 && $ok -eq 1 ]] && info "   MATCH: $nowh within range $cond"
             fi
@@ -968,33 +971,77 @@ function processtimeconditions() {
                     break
             fi
     done
-    return $((1 - $ok))
+
+    if [[ $ok -eq 0 || $nonmatches -gt 0 ]]; then
+        rv=1
+    else
+        rv=0
+    fi
+    return $rv
 }
 
 function active_cols() {
-    inactc="$RED"
-    linec=${PLAIN}
-    devc="$GREEN"
-    devbc="$BOLD$devc"
-    statec="$BOLD$YELLOW"
-    roomc="$ORANGE"
-    timec="$PINK"
-    timebc="$BOLD$timec"
-    minc="$BOLD$BLUE"
-    maxc="$BOLD$RED"
+    if [[ $RULEFORMAT == "html" ]]; then
+        plainc="<font color=#000000></strong></s>"  # black
+        inactc="<font color=#ff0000>"          # red
+        linec="<font color=#000000></strong></s>"  # black
+        devc="<font color=#00aa00>"            # green+bold
+        devbc="<strong><font color=#00aa00>"   # green
+        statec="<strong><font color=#bbbb00>"  # yellow+bold
+        roomc="<font color=#ffa500>"           # orange
+        timec="<font color=#ff97c6>"           # pink
+        timebc="<strong><font color=#ff97c6>"  # pink+bold
+        minc="<strong><font color=#0000dd>"    # blue+bold
+        maxc="<strong><font color=#dd0000>"    # red+bold
+        coolc="<strong><font color=#00dddd>"   # cyan+bold
+        heatc="<strong><font color=#dd0000>"   # red+bold
+        nl="<br></s></strong><font color=#000000>\n"
+    else
+        plainc=${PLAIN}
+        inactc="$RED"
+        linec=${PLAIN}
+        devc="$GREEN"
+        devbc="$BOLD$devc"
+        statec="$BOLD$YELLOW"
+        roomc="$ORANGE"
+        timec="$PINK"
+        timebc="$BOLD$timec"
+        minc="$BOLD$BLUE"
+        maxc="$BOLD$RED"
+        coolc="$BOLD$CYAN"
+        heatc="$RED"
+        nl="\n"
+    fi
 }
 
 function inactive_cols() {
-    inactc="$DARKGREY"
-    linec="${inactc}"
-    devc="$inactc"
-    devbc="$inactc"
-    statec="$inactc"
-    roomc="$inactc"
-    timec="$inactc"
-    timebc="$inactc"
-    minc="$inactc"
-    maxc="$inactc"
+    if [[ $RULEFORMAT == "html" ]]; then
+        plainc="<font color=#000000></strong></s>"  # black
+        inactc="<s><font color=#aaaaaa>"    # lightgrey
+        linec=""
+        devc=""
+        devbc=""
+        statec=""
+        roomc=""
+        timec=""
+        timebc=""
+        minc=""
+        maxc=""
+        nl="</s><br>\n"
+    else
+        plainc=${PLAIN}
+        inactc="$DARKGREY"
+        linec="${inactc}"
+        devc="$inactc"
+        devbc="$inactc"
+        statec="$inactc"
+        roomc="$inactc"
+        timec="$inactc"
+        timebc="$inactc"
+        minc="$inactc"
+        maxc="$inactc"
+        nl="\n"
+    fi
 }
 
 function parse_config() {
@@ -1054,7 +1101,7 @@ function parse_config() {
                     [[ $adj != "open" ]] && adj="${adj}d"
                     line_human="${line_human}Force the vent in ${roomc}${tok[1]}${linec} to be ${statec}${adj}${linec}"
                 else
-                    errstr="${errstr}${linenum}:Invalid zone state '${tok[2]}'.  Valid options are: $VALID_ZONE_STATES\n"
+                    errstr="${errstr}${linenum}:Invalid zone state '${tok[2]}'.  Valid options are: $VALID_ZONE_STATES$nl"
                     fileok=0
                 fi
             elif [[ ${tok[0]} == "owner" ]]; then
@@ -1071,24 +1118,24 @@ function parse_config() {
                 if [[ $VALID_MODES == *\ ${tok[1]}\ * ]]; then
                     local col
                     modelock="${tok[1]}"
-                    [[ $modelock == "cool" ]] && col="$BOLD$CYAN" || col="$RED"
+                    [[ $modelock == "cool" ]] && col="$coolc" || col="$heatc"
                     line_human="${line_human}Only operate the aircon in ${col}${tok[1]}${linec} mode"
                 else
-                    errstr="${errstr}${linenum}:Invalid modelock '${tok[1]}'.  Valid options are: $VALID_MODES\n"
+                    errstr="${errstr}${linenum}:Invalid modelock '${tok[1]}'.  Valid options are: $VALID_MODES$nl"
                     fileok=0
                 fi
             elif [[ ${tok[0]} == "test" ]]; then
                 line_human="${line_human}Got test option '${roomc}${tok[1]}${linec}'"
             elif [[ -n $line ]]; then
-                errstr="${errstr}${linenum}:Syntax error: ${line}\n"
+                errstr="${errstr}${linenum}:Syntax error: ${line}$nl"
                 fileok=0
             fi
         fi
         if [[ -n $line_human ]]; then
             if [[ $ok -eq 0 ]]; then
-                line_human="${PLAIN}${inactc}<INACTIVE> ${linec}${line_human}"
+                line_human="${plainc}${inactc}<INACTIVE> ${linec}${line_human}"
             fi
-            config_human="${config_human}- ${linec}${line_human}${PLAIN}\n"
+            config_human="${config_human}- ${linec}${line_human}${plainc}$nl"
         fi
         linenum=$((linenum + 1))
     done < "$CONFIGFILE"
@@ -1102,7 +1149,7 @@ function parse_config() {
         rv=0
     else
         error "Configuration file is invalid:"
-        echo -e "${RED}$errstr${PLAIN}" | sed -e 's/^/   /'
+        echo -e "${RED}$errstr${plainc}" | sed -e 's/^/   /'
         rv=1
     fi
     return $rv
@@ -1505,6 +1552,7 @@ limit=$DEFAULTLIMIT
 profiler=0
 csvfile="$DEFAULT_CSVFILE"
 sanitycheck=0
+RULEFORMAT=ansi
 
 
 # check for config file option first
@@ -1523,13 +1571,16 @@ fi
 
 ALLARGS="$ALLARGS $*"
 
-optstring="A:cf:hi:I:k:l:Lo:pmsSt:T:wx:y"
+optstring="A:cf:hHi:I:k:l:Lo:pmsSt:T:wx:y"
 while getopts "$optstring" i $ALLARGS; do
     case "$i" in
         h)
             usage;
             exit 1;
             ;;
+        H)
+            RULEFORMAT=html
+            ;;
         f)
             CONFIGFILE=${OPTARG}
             ;;