The Search Window in ColourSys performs a search on the active colour file, based on a specified colour, and lists the colours in order of closeness to the chosen colour, measured in delta-e (dE) difference.

Searching for colours

1. Click on a colour file to make it active.
2. Go to Colour Menu > Search Window…
   
   A new window will open containing all the colours in the active colour file.
   
   
3. Drag a colour from any colour file into the top section of the Search Window.  A search will be performed on the active colour file, listing the colours in the Search Window in order of closeness to the chosen colour, measured in dE difference.
4. Select a colour and drag it to the Layer Palette to use this colour in your design.
   
   Alternatively, you can ⌥ (option key) click on the colour chip at the top of the Search Window and use the AVA Multiview Picker to search for colours in your active colour file.