Hey everyone, I came across a guide that shows how to bring back the colored icons in version three. Just keep in mind that this is not an official method, and anyone who tries it does so at their own risk.
GitHub - ShawnTheBeachy/return-affinity-colors: Modifies the Serif.Affinity.dll file to return colored tool icons for Affinity v3.
Modifies the Serif.Affinity.dll file to return colored tool icons for Affinity v3. - ShawnTheBeachy/return-affinity-colors
github.com