Changing color within word in script font

Question

I am writing some text for our school and it needs to be in some German-Script-Font (Schulausgangsschrift) which I do using the package "Schulschriften".

Some letters of the words need to be colored, some don't. But if I change the color using \color or \textcolor the script letters are not properly connected anymore.

Do you have any advice?

Here are my results:

And here is my code to get this:

\documentclass[28pt,a4paper,]{article}
\usepackage{wesa}
\usepackage[latin1]{inputenc}
\usepackage{color}
\begin{document}
This Text ist in one color, so the last o is correctly connected to the t:\
\wesa Boot
\normalfont
Using color: o and t are not properly connected:\
\wesa 
B\color{red}oo\color{black}t
\normalfont
Same with textcolor:\
\wesa
B\textcolor{red}{oo}\textcolor{black}t
\end{document} 

Answer 1

As Ulrike already pointed out in this answer, using luacolor will fix the issue (you have to use LuaLaTeX to compile):

\documentclass[28pt,a4paper,]{article}
\usepackage{wesa}
\usepackage{luacolor}
\begin{document}
This Text ist in one color, so the last o is correctly connected to the t:\
\wesa Boot
\normalfont
Using color: o and t are not properly connected:\
\wesa 
B\color{red}oo\color{black}t
\normalfont
Same with textcolor:\
\wesa
B\textcolor{red}{oo}\textcolor{black}t
\end{document}