Choosing colors

Is there an example where I can choose the colors directly rather than let the library choose a mapping between data types and colors?

Something like:
```cpp
auto data = trase::create_data().x(x).y(y).color(color).fill(color);
```

where color is something like:
```cpp
std::vector<std::string> color = {"#FFA500", "#000000", "#FFFF00"};
```
etc...