[NTG-context] use color in XeTeX+ConTeXt

Dear all, In ConTeXt, the following example was shown in colors. \setupcolors[state=start] \starttext The use of color in \TeX is not {\red easy}. {\blue What color is it?} \stoptext but, the same text after defining new typescript and saved for XeTeX +ConTeXt, the colors were gone. It is possible to change color using following method: \special{color push} \special{color rgb 0.0 0.5 0.8} sample text \special{color pop} However, is there a simpler way to use color in XeTeX+ConTeXt as in ConTeXt? Thank you Dalyoung