How can i put more intense colors to strong relations and light colors to the weak ones?

[efotopoulou]

First of all congratulations for this R package! it is really awesome and has soooo many applications!

I create a big chord diagram that represents the correlation matrix between many metrics i get from Prometheus monitoring framework. An example of this chord diagram can be seen below:

I know that via the groupColors attribure i can control the color of the groups. But i want to be able to define the color of the matrix cells as well. For example metric28 has a very high correlation with metric 108 (89.03%) as seen below:

I would like to put more intense colors to strong relations and light colors to the weak ones.
I have created the necessary vector but i need a placeholder to put it at the chord diagram. As seen at the above pallete, only 4 relations are in deep blue....so actually i am only interested in them.

Hope the issue description is well explained!
Thank you very much for you time!