Reduce Color Saturation inside Selection in Affinity Designer

[geometry]

I am quite new to Affinity Designer and I have a (probably) pretty simple question. In Designer, I draw two vector shapes with two different colors. Next, I use the rectengular marquee tool to select a square of the two shapes as shown in the attached screen shot. Inside the selection I want to reduce the color saturation, outside the colors should not change. Can someone help me with this issue? Thanks in advance.

[Callum]

Hi Geometry,

Welcome to the forums

You should be able to do this using the HSL adjustment please see my attachment regarding this below.

C

[geometry]

Fixed my problem. Thanks a lot for your help.