tcolorbox.sty and tikz not supporting spot color (using dvips)

My codes are follows:

% Using spot colors with xcolor and pstricks.
% process with:
% $ latex xcpst
% $ dvips -h tex.pro -h xcolor.pro -h spot.pro filename.dvi
begin{filecontents*}{PANTONE2925C.pro}
% spot.pro
TeXDict begin
/SpotsCMYK [0.85 0.24 0 0] def
/Pantone2925CSpot (Pantone2925C) def
/Pantone2925CDef SpotsCMYK aload pop Pantone2925CSpot
findcmykcustomcolor def
/XC@Pantone2925C{ Pantone2925CDef 1.0 setcustomcolor}XCdef
/XC@Pantone2925C100{ Pantone2925CDef 1.0 setcustomcolor}XCdef
end
end{filecontents*}

documentclass{book}
usepackage[prologue]{xcolor}%
input colordvi%%

definecolor{Pantone2925C}{cmyk}{1 0 0 0}
colorlet{Pantone2925C100}{Pantone2925C}

usepackage{tikz}
usetikzlibrary{arrows,backgrounds,calc,positioning,shapes,shadows}

makeatletter
newboxtcolorboxstut%
setboxtcolorboxstut=hbox{hy}%
newdimentcolorboxstutdimen%
tcolorboxstutdimen=httcolorboxstut%
advancetcolorboxstutdimen by -1.75p@%
usepackage[breakable]{tcolorbox}%
tcbuselibrary{skins,breakable}
tcbset{enhanced jigsaw,colback=white,colframe=Pantone2925C,boxrule=3pt,breakable,arc=5pt,before skip=17.5pt,after skip=16pt,bottom=tcolorboxstutdimen}%
makeatother
begin{document}

begin{tcolorbox} {bf Experimental research} examines how a treatment causally
  affects an outcome by assigning varying values of the treatment
  variable to different observations and measuring their corresponding
  values of the outcome variable.
end{tcolorbox}

textcolor{Pantone2925C}{For Test}
end{document}

I am using LaTeX then dvips -Ppdf -h tex.pro -h xcolor.pro -h PANTONE2925C.pro test.dvi and then PS2PDF to get the PDF output.

Output generated successfully, but the tcolorbox still shows in CMYK only, but the same time, the text For Test showed in Pantone color, how can I achieve this? Please suggest…

EDIT

As Ulrike advise, I’ve tried with colorspace.sty with PDFLaTeX and the MWE is:

documentclass{book}
usepackage{colorspace}
definespotcolor{PANTONE286UC100}{PANTONE286UC}{0.90,0.75,0.01,0}
usepackage{tcolorbox}
tcbuselibrary{skins}
begin{document}

begin{tcolorbox}[enhanced jigsaw,colback=white,colframe=PANTONE286UC100,boxrule=3pt,arc=5pt]
The content of this chapter has been published in the SRRW conference in 2017.  The work of this chapter is also extended to handle the ER problem. 
end{tcolorbox}

textcolor{PANTONE286UC100}{This is for test}
end{document}

But it produced the empty page, if I change the color from colframe=PANTONE286UC100 to colframe=cyan then it works, please advise how to get Spot color for colframe….