Help with extension of Harmonica tablature plugin

During the day, I've tried to make some changes / renames / "learning to code". Now I have merged your new code with my attempt. please, I kindly ask you to check if this could work (especially he conditions evaluations)

From the line containing "undefined", I did not touch the code.
Question: where is now defined the default color? (I'm not saying you made an error, I just don't see it in the code, so maybe you solved it differently and I just do not have the knowledge to see the connection).
Otherwise, it looks like we are almost at the finish.

There are two places with
cursor.add(text);

One for grace notes and one for normal ones.
I add this line
setColor(notes, text);

to both places, always just before cursor.add(text); (i.e. after calling the tabNotes function, which extracts the proper tablature) - correct?

Thank you very much

function setColor(notes, text) {
//set value start
var charover = "♯"
var charbend = "/"
var chardraw = "-"
var overblowcolor = "#FF0000"
var blowbendcolor = "#00FF00"
var overdrawcolor = "#0000FF"
var drawbendcolor = "#FF00FF"
//set value stop

var color
var tablature = text.text

var tstbend = tablature.indexOf(charbend) > -1
var tstover = tablature.indexOf(charover) > -1
var tstdraw = tablature.indexOf(chardraw) > -1

if (tstbend){//bends
if (tstdraw){
color = drawbendcolor
}
else{
color = blowbendcolor
}
}
else{
if (tstover){//overs
if !(tstdraw){
color = overblowcolor
}
else{
color = overdrawcolor
}
}
}
if(typeof(color) !== "undefined"){
text.color = color

    for (var k = 0; k < notes.length; k++) {
          var note = notes[k];
          note.color = color;
          if (note.accidental) {
                note.accidental.color = color;
          }
          for (var i = 0; i < note.dots.length; i++) {
                if (note.dots[i]) {
                      note.dots[i].color = color;
                }
          }
    }

}
}