####
#####
  ###
  ###
 #####      Name of chapter

documentclass{scrbook}
usepackage{lmodern}
renewcommand*{chapterformat}{%
  fontsize{80}{88}selectfontthechapterautodotenskip}
begin{document}
chapter{Name of chapter}
end{document}

setkomafont{sectioning}{rmfamilybfseriescolor{Gray}}