+ out << "\t<color name=\"" << name << "\">" << std::endl;
+ out << "\t\t<r>" << fluid_color.r() << "</r>" << std::endl;
+ out << "\t\t<g>" << fluid_color.g() << "</g>" << std::endl;
+ out << "\t\t<b>" << fluid_color.b() << "</b>" << std::endl;
+ out << "\t</color>" << std::endl;