\documentclass[border=10]{standalone}
%\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{decorations.text}
\usepackage{anyfontsize}
\usepackage{xcolor}
\usepackage{graphicx}



\definecolor{epsilon-purple}{rgb}{0.19,0.086,0.388}
%neonvihreä
\definecolor{vlehti}{rgb}{0.5,1,0.3}
\definecolor{vreuna}{rgb}{0.2,0.8,0.1}
\definecolor{vteksti}{rgb}{0.2,0.8,0.1}

%vihreä
\definecolor{vlehti}{rgb}{0,1,0}
\definecolor{vreuna}{rgb}{0,0.7,0}
\definecolor{vteksti}{rgb}{0,1,0}

%kulta
\definecolor{vlehti}{rgb}{0.917647, 0.741176, 0}
\definecolor{vreuna}{rgb}{0.817647, 0.641176, 0}
\definecolor{vteksti}{rgb}{0.817647, 0.641176, 0}

\newcommand{\e}{{\color{vreuna}\fontfamily{lmr}\selectfont \rotatebox[origin=c]{270}{$\varepsilon$}}}
\newcommand{\s}{{\color{blue}\fontfamily{lmr}\selectfont \rotatebox[origin=c]{270}{$\varepsilon$}}}
\newcommand{\q}{{\color{red}\fontfamily{lmr}\selectfont \rotatebox[origin=c]{270}{$\varepsilon$}}}

\begin{document}

\begin{tikzpicture}[>=stealth]
\fill[gray!20] (-1,-3) rectangle (12,2);
\draw (0,0)--(10,0);
\draw (0,-2)--(5,0) node[midway,above,sloped,blue]{Photonics in Joensuu:}
node[midway,below,sloped,purple]{Fotoniikkaa Joensuussa:};
\draw[->,blue] (5,0)--(11,1) node[near start,above,sloped,blue]{\quad\quad\quad\quad\quad\quad\quad Five Decades of Shining Light};

\draw[->,purple] (5,0)--(11,-2)
node[near start,below,sloped,purple]{\quad\quad\quad\quad\quad\quad\quad\quad\quad Viisi Vuosikymmentä Valon Loistetta};
\end{tikzpicture}


\end{document}

Fotoniikkaa Joensuussa: Viisi Vuosikymmentä Valon Loistetta

Photonics in Joensuu: Five Decades of Shining Light