message: dnn: add another color to Net::Impl::dump()
diff: @@ -4461,7 +4461,7 @@ string Net::Impl::dump()
  prevNode = itBackend->second;
  }
  }
  - string colors[] = {"#ffffb3", "#fccde5", "#8dd3c7", "#bebada", "#80b1d3", "#fdb462", "#ff4848", "#b35151"};
  + std::vector<string> colors = {"#ffffb3", "#fccde5", "#8dd3c7", "#bebada", "#80b1d3", "#fdb462", "#ff4848", "#b35151", "#b266ff"};
  string backend;
  switch (prefBackend)
  {
  @@ -4613,6 +4613,7 @@ string Net::Impl::dump()
  case DNN_TARGET_CUDA_FP16: out << "CUDA_FP16"; colorId = 6; break;
  // don't use default:
  }
  + CV_Assert(colorId < colors.size());
  out << "\\n"; // align center
  out << ((clusterIds.size() == 1)? "\" " : " }\" ");
  out << "fillcolor=\"" << colors[colorId] << "\" ";
  