# Customizing the Color Palette

By default, DeepDrill colorizes the computed images with a default color palette. A custom color palette can be used by assigning a path to a palette image to the `palette.image` key. Here is an example: 
```none
./deepdrill top.ini -o image.map -o image.jpg palette.image=dolomiti.png
```

![Recolored Mandelbrot set](images/recolored1.jpg "Recolored Mandelbrot set")

DeepDrill does not rely on a special palette format. Instead, the color palettes is specified in the form of a standard image file. For simplicity, there are no restrictions on the image format. DeepDrill composes the color palette from the pixels of the first horizontal line and ignores all others. The horizontal resolution of the palette does not affect the overall appearance of the image. However, wider images result in slightly smoother color transitions.

In addition, DeepDrill provides two keys to manipulate the color palette. Key `palette.scale` controls how fast the palette repeats. The following examples shows the effect: 
```none
./deepdrill top.ini -o image.map -o image.jpg palette.image=dolomiti.png palette.scale=10.0 
```
![Recolored Mandelbrot set](images/recolored_scaled.jpg "Recolored Mandelbrot set")

Key `palette.offset` can be utilized to shift the color palette like so: 
```none
./deepdrill top.ini -o image.map -o image.jpg palette.image=dolomiti.png palette.scale=10.0 palette.offset=0.5
```
![Recolored Mandelbrot set](images/recolored_scaled_shifted.jpg "Recolored Mandelbrot set")

## Predefined palettes

In the example shown above we have used image file `vulcano.png` which is one of several predefined color palettes. The images below give an overview of the available choices. Since you can pass any image file, it is easy to colorize  images with self-made palettes:

*default*
![Default palette](images/default.png "Default palette")

*candy*
![candy palette](images/candy.png "candy palette")

*dolomiti*
![dolomiti palette](images/dolomiti.png "dolomiti palette")

*elements*
![elements palette](images/elements.png "elements palette")

*ice*
![ice palette](images/ice.png "ice palette")

*lindor*
![lindor palette](images/lindor.png "lindor palette")

*pistachio*
![pistachio palette](images/pistachio.png "pistachio palette")

*prism*
![prism palette](images/prism.png "prism palette")

*ruby*
![ruby palette](images/ruby.png "ruby palette")

*ultrafrac*
![ultrafrac palette](images/ultrafrac.png "ultrafrac palette")

*vulcano*
![vulcano palette](images/vulcano.png "vulcano palette")