How to change only one color on texture map in Keyshot Graph

[masewZ]

I hope everyone in here can give me some advice to solve this problem.

[Liam Martin]

Hi, I'm not 100% sure what youre trying to achieve but try adding in a Colour Composite node before the Diffuse input. You can then plug your mask texture into the Background input and play around with the Blend Mode and Background Alpha controls affect how the mask works.

Also, you could adding in a Colour Adjust node before the Diffuse input and use the mask texture to control on the variables (contrast, saturation, value etc.).

Hope that helps