I have a table which I want to fill with multiple colors, each cell possibly different from another. Which means, I can't make use of e.g. `\columncolor` (as in [this](https://tex.stackexchange.com/questions/65231/cellcolor-overwrites-partial-horizontal-lines-cline) post).

While the table without any colors looks just fine (code at the end):
![empty table](https://i.stack.imgur.com/I2ilU.png)

...the table with one or more filled cells overwrites the table grid.
![filled tables](https://i.stack.imgur.com/K7brB.png)

**So my question is:** Is there a way to, for example, redraw the grid after filling the cells or something?

Here is my code:

```
\documentclass[11pt]{article}

\usepackage{color}
\usepackage{colortbl}
\usepackage{multirow}

\newlength{\Oldarrayrulewidth}
% Cline redefining to add line thickness
\newcommand{\Cline}[2]{%
  \noalign{\global\setlength{\Oldarrayrulewidth}{\arrayrulewidth}}%
  \noalign{\global\setlength{\arrayrulewidth}{#1}}\cline{#2}%
  \noalign{\global\setlength{\arrayrulewidth}{\Oldarrayrulewidth}}
}

\definecolor{intnull}{RGB}{213,229,255}
\definecolor{inteins}{RGB}{128,179,255}
\definecolor{intzwei}{RGB}{42,127,255}
\definecolor{intdrei}{RGB}{0,85,212}
\definecolor{intvier}{RGB}{0,51,128}
\definecolor{intfunf}{RGB}{0,34,85}

\begin{document}
% Empty table
\begin{tabular}{*{5}{!{\vrule width 1.5pt}p{1.5cm}}!{\vrule width 1.5pt}l}
\centering 4 &
\centering 10 &
\centering 24 &
\centering 48 &
\centering 72 &\\ \Cline{1.5pt}{0-4}
 &  &  &  &  & Optic tectum \\ \Cline{1.5pt}{3-5}
 &  &  &  &  & Retina \\ \Cline{1.5pt}{3-5}
 &  &  &  &  & Myomeres \\ \Cline{1.5pt}{0-4}
 &  &  &  &  & Arches \\ \Cline{1.5pt}{0-4}
\end{tabular} \\

\hspace*{1cm}

% Partically filled table
\begin{tabular}{*{5}{!{\vrule width 1.5pt}p{1.5cm}}!{\vrule width 1.5pt}l}
\centering 4 &
\centering 10 &
\centering 24 &
\centering 48 &
\centering 72 &\\ \Cline{1.5pt}{0-4}
 & \cellcolor{intnull} &  & \cellcolor{intvier} &  & Optic tectum \\ \Cline{1.5pt}{3-5}
 & \cellcolor{intnull} &  & \cellcolor{intnull} &  & Retina \\ \Cline{1.5pt}{3-5}
 & \cellcolor{intnull} &  & \cellcolor{intdrei} &  & Myomeres \\ \Cline{1.5pt}{0-4}
 & \cellcolor{inteins} &  & \cellcolor{inteins} &  & Arches \\ \Cline{1.5pt}{0-4}
\end{tabular}

\end{document}

```