diff --git a/colors.tex b/colors.tex
new file mode 100644
index 0000000..b57f2da
--- /dev/null
+++ b/colors.tex
@@ -0,0 +1,19 @@
+
+\ifdefined\colormodel\relax\else%
+    \def\colormodel{rgb}%
+\fi
+\selectcolormodel{\colormodel}
+
+% \definecolor{ese_bg_color}{rgb}{0.0, 0.20, 0.376} % the definitive color -- #003360 (2015?)
+% \definecolor{ese_bg_color}{rgb}{0.0, 0.263, 0.486} % the definitive color -- #00437C (2016?)
+% \definecolor{ese_bg_color}{rgb}{0.051, 0.373, 0.596} % the definitive color -- #0D5F98 (2017)
+% \definecolor{ese_bg_color}{rgb}{0.796, 0.376, 0.251} % the definitive color -- #CB6040 (2018)
+% \definecolor{ese_bg_color}{rgb}{0.0, 0.47, 0.3} % wip-ish color -- #01794C (2019)
+%\definecolor{ese_bg_color}{RGB}{5,109,133} % final_really_final -- #056d85 (2020)
+
+\definecolor{ese_bg_color}{RGB/cmyk}{155,30,70/0,0.9,0.6,0.1} % complement -- #9B1E46 (2021)
+\definecolor{ese_fg_color}{rgb/cmyk}{1,1,1/0,0,0,0}
+
+\definecolor{fancypageref_color}{RGB/cmyk}{155,30,70/0,0.9,0.6,0.1} %
+
+\definecolor{ifsrgray}{rgb/cmyk}{0.6,0.6,0.6/0,0,0,0.4} % 153, 153, 153
diff --git a/preamble.tex b/preamble.tex
index 446c3f0..cb48bd3 100644
--- a/preamble.tex
+++ b/preamble.tex
@@ -2,6 +2,7 @@
 
 \usepackage[english, ngerman]{babel}
 
+\usepackage{xcolor}
 \usepackage{graphicx}
 \usepackage{fancyhdr}
 \usepackage{eso-pic}
@@ -30,19 +31,7 @@
 \PassOptionsToPackage{hyphens}{url}
 \usepackage[colorlinks=false, pdfborder={0 0 0}]{hyperref}
 
-
-% \definecolor{ese_bg_color}{rgb}{0.0, 0.20, 0.376} % the definitive color -- #003360 (2015?)
-% \definecolor{ese_bg_color}{rgb}{0.0, 0.263, 0.486} % the definitive color -- #00437C (2016?)
-% \definecolor{ese_bg_color}{rgb}{0.051, 0.373, 0.596} % the definitive color -- #0D5F98 (2017)
-% \definecolor{ese_bg_color}{rgb}{0.796, 0.376, 0.251} % the definitive color -- #CB6040 (2018)
-% \definecolor{ese_bg_color}{rgb}{0.0, 0.47, 0.3} % wip-ish color -- #01794C (2019)
-% \definecolor{ese_bg_color}{RGB}{5,109,133} % final_really_final -- #056d85 (2020)
-\definecolor{ese_bg_color}{RGB}{155,30,70} % complement -- #9B1E46 (2021)
-\definecolor{ese_fg_color}{rgb}{1, 1, 1}
-
-\definecolor{fancypageref_color}{RGB}{155,30,70} % 
-
-\definecolor{ifsrgray}{rgb}{0.6, 0.6, 0.6} % 153, 153, 153
+\input{colors.tex}
 
 % is toggled twice for moduluebersicht.tex
 \changemenucolor{gray}{bg}{named}{ese_fg_color} %background of the menukeys
diff --git a/timetable/timetable.sty b/timetable/timetable.sty
index 842acbb..1115a82 100755
--- a/timetable/timetable.sty
+++ b/timetable/timetable.sty
@@ -22,7 +22,7 @@
 
 \NeedsTeXFormat{LaTeX2e}
 \ProvidesPackage{timetable}
-\RequirePackage{ifthen, calc, color}
+\RequirePackage{ifthen, calc, xcolor}
 
 % swtich case helper
 \newcommand\addcase[3]{\expandafter\def\csname\string#1@case@#2\endcsname{#3}}
@@ -35,11 +35,11 @@
 
 
 % Preset the colors
-\definecolor{ttframecol1}{rgb}{0.95,0.95,0.95}
-\definecolor{ttframecol2}{rgb}{0.9,0.9,0.9}
-\definecolor{ttfontcolor}{rgb}{0.25,0.25,0.25}
-\definecolor{ttlinecol1}{rgb}{0.0,0.0,0.0}
-\definecolor{ttlinecol2}{rgb}{0.5,0.0,0.0}
+\definecolor{ttframecol1}{rgb/cmyk}{0.95,0.95,0.95/0,0,0,0.05}
+\definecolor{ttframecol2}{rgb/cmyk}{0.9,0.9,0.9/0,0,0,0.1}
+\definecolor{ttfontcolor}{rgb/cmyk}{0.25,0.25,0.25/0,0,0,0.75}
+\definecolor{ttlinecol1}{rgb/cmyk}{0.0,0.0,0.0/0,0,0,1}
+\definecolor{ttlinecol2}{rgb/cmyk}{0.5,0.0,0.0/0,1,1,0.5}
 
 % Simple for loop construct as proposed by N. Setzer
 \newcommand{\@ttforloop}[5][1]
@@ -560,6 +560,18 @@
     \legend {\value{@daymarks}} 1 {#1}
   }
 
+\newcommand{\defineeventcolors}[5]
+  {
+    \definecolor{@timetable#1block}{#2}{#3}
+    \definecolor{@timetable#1text} {#4}{#5}
+  }
+
+\newcommand{\leteventcolors}[3]
+  {
+    \colorlet{@timetable#1block}{#2}
+    \colorlet{@timetable#1text} {#3}
+  }
+
 \newcommand{\defineevent}[7]
   {
     \definecolor{@timetable#1block}{rgb}{#2, #3, #4}
diff --git a/timetable/zeitplan.pdf b/timetable/zeitplan.pdf
old mode 100755
new mode 100644
diff --git a/timetable/zeitplan.tex b/timetable/zeitplan.tex
index 8c81b5f..916b6be 100755
--- a/timetable/zeitplan.tex
+++ b/timetable/zeitplan.tex
@@ -2,6 +2,7 @@
 \usepackage[default]{opensans}
 \usepackage[margin=0.55cm,landscape]{geometry}
 % \usepackage[height=25cm]{geometry}
+\usepackage{xcolor}
 \usepackage{timetable}
 \usepackage{transparent}
 \usepackage{amssymb}
@@ -9,6 +10,8 @@
 \usepackage{pifont}
 \newcommand{\wontfix}{\rlap{$\square$}{\large\hspace{1pt}\xmark}}
 
+\input{../colors.tex}
+
 \begin{document}
 \thispagestyle{empty}
 % \begin{landscape}
@@ -33,6 +36,9 @@
 \defineevent{other}{0.0}{0.47}{0.3}{1.0}{1.0}{1.0}% dunkelgrün
 \defineevent{extern}{0.77}{0.56}{0.05}{1.0}{1.0}{1.0}
 \defineevent{stream}{0.09}{0.45}{0.56}{1.0}{1.0}{1.0}% petrol
+\leteventcolors{ese}%
+  {ese_bg_color}
+  {ese_fg_color}
 
 % Start the timetable
 \begin{center}