When I print to my Epson printer from my iMac using Affinity photo the colours come out dark and with a brownish tint.
If I export the file and then use my Epson Print Layout app to print the photo everything is perfect.
The print settings for both apps are identical so I cannot understand why Affinity Photo is printing the colours wrong.
I have reset the app to all the default settings just in case something was incorrect but this has not helped.
The Epson app seems to have colour settings as shown on their website https://epson.com/epson-print-layout – whereas Affinity doesn't have this options. So it appears hard to judge whether the "print settings for both apps are identical".
On mac the difference might be caused by macOS which prefers using its driverless Airprint technology and thus does not transfer possible options of an Epson printer driver to Affinity. As workaround you can try to install another virtual printer but