diff --git a/poc b/poc
index 66c63ad..8be5ac2 100755
--- a/poc
+++ b/poc
@@ -4,7 +4,39 @@
 
 MIAOU_BASH_ERROR=$(mktemp -t "$(basename "$0").XXXXXXXX" --tmpdir="/run/user/$(id -u)")
 MIAOU_DEBUG=${MIAOU_DEBUG:-false}
-readonly MIAOU_BASH_ERROR MIAOU_DEBUG
+
+declare -A ANSI
+ANSI[RESET]=0
+
+ANSI[STYLE_ITALIC]=3
+ANSI[STYLE_BOLD]=1
+ANSI[STYLE_UNDERLINE]=4
+ANSI[STYLE_STRIKETHROUGH]=9
+
+ANSI[FG_BLACK]=30
+ANSI[FG_RED]=31
+ANSI[FG_GREEN]=32
+ANSI[FG_YELLOW]=33
+ANSI[FG_BLUE]=34
+ANSI[FG_PURPLE]=35
+ANSI[FG_CYAN]=36
+ANSI[FG_WHITE]=37
+ANSI[FG_GRAY]=90
+ANSI[FG_LIGHTBLUE]=94
+ANSI[FG_MAGENTA]=95
+
+ANSI[BG_BLACK]=40
+ANSI[BG_RED]=41
+ANSI[BG_GREEN]=42
+ANSI[BG_YELLOW]=43
+ANSI[BG_BLUE]=44
+ANSI[BG_PURPLE]=45
+ANSI[BG_CYAN]=46
+ANSI[BG_WHITE]=47
+ANSI[BG_GRAY]=90
+ANSI[BG_MAGENTA]=95
+
+readonly MIAOU_BASH_ERROR MIAOU_DEBUG ANSI
 
 ## functions
 
@@ -20,8 +52,12 @@ function miaou_debug {
 }
 
 function tty_ansi {
-  fg="${1:-}"
-  [[ -n $fg ]] && >/dev/tty echo -ne "\e[${fg}m" || true
+  local code="$1"
+  if [[ -v ANSI[$code] ]]; then
+    >/dev/tty echo -ne "\e[${ANSI[$code]}m"
+  else
+    >&2 echo "unknown ansi key: <$code>"
+  fi
 }
 
 function print_miaou_error {
@@ -75,6 +111,7 @@ function on_pipe {
     lineno=${BASH_REMATCH[2]}
     failure_code=${BASH_REMATCH[3]}
     failure_type="SUBSHELL_ERROR"
+    failure_payload='...'
     error_source=("$source" "${error_source[@]}")
     error_lineno=("$lineno" "${error_lineno[@]}")
     error_funcname=("${error_funcname[@]}" '<main>')
@@ -89,28 +126,26 @@ function on_pipe {
 function dump_stderr {
   miaou_debug --stderr--
   mapfile -t tmp_error <"$MIAOU_BASH_ERROR"
-  tty_ansi 94
+  tty_ansi FG_LIGHTBLUE
   for i in "${tmp_error[@]}"; do echo "$i"; done
-  tty_ansi 0
+  tty_ansi RESET
   miaou_debug --end of stderr--
 }
 
 function dump_failure {
   local i
   miaou_debug --tty error box--
-  tty_ansi 95
-  length_box=$((${#failure_type} + ${#failure_code} + (2 * 2) + 1))
+  tty_ansi FG_MAGENTA
+  length_box=$((${#failure_type} + ${#failure_code} + (2 * 2) + 2))
+  [[ -v failure_payload ]] && length_box=$((length_box + ${#failure_payload} + (2 * 2) + 1))
   echo -n '╔'
   for i in $(seq 1 $length_box); do echo -n '═'; done
   echo '╗'
-  echo -n "║ $failure_type"
-  if [[ -v failure_payload ]]; then
-    tty_ansi 94
-    echo -n " $failure_payload"
-  fi
-  tty_ansi 33
+  echo -n "║ $failure_type "
+  [[ -v failure_payload ]] && echo -n ' ' && tty_ansi FG_CYAN && echo -n "  $failure_payload  "
+  tty_ansi FG_YELLOW
   printf "%5s" "  $failure_code  "
-  tty_ansi 95
+  tty_ansi FG_MAGENTA
   echo "║"
   echo -n '╚'
   for i in $(seq 1 4); do echo -n '═'; done
@@ -118,7 +153,7 @@ function dump_failure {
   for i in $(seq $((i + 2)) $length_box); do echo -n '═'; done
   echo '╝'
   echo "     ║"
-  tty_ansi 0
+  tty_ansi RESET
   miaou_debug --end of tty error box--
 }
 
@@ -126,15 +161,15 @@ function dump_stacktrace {
   miaou_debug --stacktrace ${#error_source[@]}--
   local i source lineno funcname
   for i in "${!error_source[@]}"; do
-    tty_ansi 95
+    tty_ansi FG_MAGENTA
     echo -n "     ╟─⟶"
-    [[ $i -gt 0 ]] && tty_ansi 90
-    tty_ansi 3
+    [[ $i -gt 0 ]] && tty_ansi FG_GRAY
+    tty_ansi STYLE_ITALIC
     source="${error_source[$i]}"
     lineno="${error_lineno[$i]}"
     funcname="${error_funcname[$i]}"
     printf "%40s:%.4s" "$source" "$lineno"
-    tty_ansi 0
+    tty_ansi RESET
     printf " \t%s" "$funcname"
     echo
   done