Sketch Engine assigns a colour to each search word (or a subcorpus) and generates the two word sketches. Then it compares the use of each collocate with both search words or in both subcorpora in each grammatical relation separately.
The colours indicate the search word (or a subcorpus) where the collocate is more frequent. The shade of the colour indicates the strength of the collocation. The white lines in the centre contain collocates without a preference of a green or red word or a subcorpus.
The user can use view options to display the frequencies and scores. The local menu will use the selected collocate as the search word of other tools.