documentclass[a4]{report}
usepackage[utf8]{inputenc}
usepackage{xcolor}
usepackage{listings}

definecolor{backcolour}{RGB}{242,242,0235}
definecolor{codegray}{RGB}{128,128,128}
definecolor{codeOrange}{RGB}{254, 97, 0}
definecolor{codeBlue}{RGB}{100, 143, 255}

lstdefinestyle{newStyle}{
    backgroundcolor=color{backcolour},
    commentstyle=color{codeBlue},
    keywordstyle=[0]color{codeBlue},
    keywordstyle=[1]color{codeBlue},
    keywordstyle=[2]color{codeBlue},
    keywordstyle=[3]color{codeBlue},
    numberstyle=tinycolor{codegray},
    stringstyle=color{codeOrange},
    basicstyle=ttfamily,
    breakatwhitespace=false,
    breaklines=true,
    captionpos=b,
    keepspaces=true,
    showspaces=false,
    showstringspaces=false,
    showtabs=false,
    tabsize=4
}

lstdefinelanguage{newLanguage}{
    keywords={type,def,True,False},
    otherkeywords={!,$,|,<,[,],::,=>,>},
    otherkeywords={>},
    sensitive=true,
    morecomment=[l]{//},
    morecomment=[n]{/*}{*/},
    morestring=[b]",
    morestring=[b]"""
}


begin{document}
begin{lstlisting}[language=newLanguage,style=newStyle]
a = [1,>,2]
b => c
end{lstlisting}

end{document}