Determine host color through hash function

.bashrc

@@ -37,37 +37,30 @@ shopt -s histappend
 set -C
 
 PS1=""
-case "$HOSTNAME" in
-    meret)
-        PS_COLOR=37
-        ;;
-    nout)
-        PS_COLOR=36
-        ;;
-    aton|bastet)
-        PS_COLOR=35
-        ;;
-    khonsou)
-        PS_COLOR=34
-        ;;
-    ptah|pc-mercie_d)
-        PS_COLOR=33
-        ;;
-    sekhmet)
-        PS1="$PS1[\t] "
-        PS_COLOR=32
-        ;;
+MD5CMD=`(which md5sum > /dev/null && echo "md5sum") ||
+(which md5 > /dev/null && echo "md5") || echo "cat"`
+
+case `echo $(hostname) | $MD5CMD | sed -E 's/^.(.).*$/\1/'` in
+    "1"|"6"|"b")
+        HOST_COLOR=36 ;;
+    "2"|"7"|"c")
+        HOST_COLOR=32 ;;
+    "3"|"8"|"d")
+        HOST_COLOR=35 ;;
+    "4"|"9"|"e")
+        HOST_COLOR=34 ;;
+    "5"|"a"|"f")
+        HOST_COLOR=33 ;;
     *)
-        PS_COLOR=30
-        ;;
+        HOST_COLOR=37 ;;
 esac
 
 if [ "$USER" == "root" ]; then
-    PS_COLOR=31
+    HOST_COLOR=31
 else
     PS1=$PS1"\u@"
 fi
-PS1=$PS1'\[\e[$PS_COLOR;01m\]\h\[\e[00m\]:\[\e[01;34m\]\W\[\e[00m\]'
+PS1=$PS1'\[\e[$HOST_COLOR;01m\]\h\[\e[00m\]:\[\e[01;34m\]\W\[\e[00m\]'
 PS1=$PS1'\[`if [ $? -eq 0 ]; then echo -ne "\033[0;32m"; else echo -ne "\033[0;31m"; fi`\]'
 PS1=$PS1'\$\[\033[0m\] '