This article describes the color harmonies that are reported by Panorama in Peakto.
As described in
Color palettes and harmonies in Peakto, each image has 2 extracted color palettes and each of these palettes is analysed to determine if it fits a specific color harmony scheme.
Panorama uses the color schemes to create associated navigation that group images having the same scheme. An additional criteria is applied on colourfulness to filter out palettes that are not colourful enough.