This is the document output, looks OK to me in Word and OpenOffice. What does it print for you ?

{\rtf1\ansi\deff0{\fonttbl
{\f0 \froman Times New Roman;}
}
{\colortbl ;\red255\green0\blue0;\red0\green255\blue0;\red0\green0\blu
+e255;\red255\green128\blue0;}
{\info 
{\creatim \yr2017\mo7\dy10\hr17\min20\sec45}
{\revtim \yr2017\mo7\dy10\hr17\min20\sec45}
{\title Color Test}
{\doccomm written by rtf1\'2epl [Perl RT\'46::Writer v1\'2e11]}
}

{\pard
\cf1
This is Red
\par}

{\pard
\cf2
This is Green
\par}

{\pard
\cf3
This is Blue
\par}

{\pard
\cf4
This is Orange
\par}

}
[download]

I got it to work. Thanks!