Use a magenta hexagon instead of 🔹 in the PS1

... because of its likeness to the Toolbox logo. Note that the magenta
foreground colour is requested through a terminal escape sequence with
SGR parameters [1]. The specific colour code for magenta is 35.

The main body of the PS1 needs to be split out to prevent Bash from
complaining:
  bash: printf: missing unicode digit for \u

[1] https://en.wikipedia.org/wiki/ANSI_escape_code

https://github.com/debarshiray/toolbox/pull/150

profile.d/toolbox.sh

@@ -25,7 +25,7 @@ fi
 
 if [ -f /run/.containerenv ] \
    && [ -f /run/.toolboxenv ]; then
-    PS1="🔹[\u@\h \W]\\$ "
+    PS1=$(printf "\033[35m⬢\033[0m%s" "[\u@\h \W]\\$ ")
 
     if ! [ -f "$toolbox_welcome_stub" ]; then
         echo ""