Make a color box with the trans pride flag

With tcolorbox it is easy. This code is based on this post. Of course, you can combine this with other tcolorbox features. Here is a basic variant.

documentclass{article}
usepackage{tcolorbox}
tcbuselibrary{skins}
usetikzlibrary{calc}
definecolor{pride1}{RGB}{136,205,248}
definecolor{pride2}{RGB}{226,168,182}
tcbset{pride/.style={enhanced,hbox,colback=white,
underlay={begin{tcbclipinterior}
fill[pride1] let p1=($(interior.north)-(interior.south)$) in
foreach X in {1,5}
{([yshift={X*y1/5}]interior.south west) rectangle 
([yshift={(X-1)*y1/5}]interior.south east)};
fill[pride2] let p1=($(interior.north)-(interior.south)$) in
foreach X in {2,4}
{([yshift={X*y1/5}]interior.south west) rectangle 
([yshift={(X-1)*y1/5}]interior.south east)};
end{tcbclipinterior}}}}
begin{document}

begin{tcolorbox}[fontupper=sffamilybfseries,pride]
hello world
end{tcolorbox}
end{document}

Here is an example that uses additional options.

documentclass{article}
usepackage{tcolorbox}
tcbuselibrary{skins}
usetikzlibrary{calc}
definecolor{pride1}{RGB}{136,205,248}
definecolor{pride2}{RGB}{226,168,182}
tcbset{pride/.style={enhanced,hbox,colback=white,
underlay={begin{tcbclipinterior}
fill[pride1] let p1=($(interior.north)-(interior.south)$) in
foreach X in {1,5}
{([yshift={X*y1/5}]interior.south west) rectangle 
([yshift={(X-1)*y1/5}]interior.south east)};
fill[pride2] let p1=($(interior.north)-(interior.south)$) in
foreach X in {2,4}
{([yshift={X*y1/5}]interior.south west) rectangle 
([yshift={(X-1)*y1/5}]interior.south east)};
end{tcbclipinterior}}},
tight/.style={on
line,boxsep=0pt,left=#1,right=#1,top=#1,bottom=#1,arc=0pt,boxrule=0pt},
tight/.default=0pt}
begin{document}

the heat
begin{tcolorbox}[tight,pride]
trans
end{tcolorbox}fer coefficient is yadda yadda yadda
end{document}