I've always had trouble working with colours in Affinity. I believe in its current state it's a very clumsy and inefficient way of doing things. Not to mention frustrating. Im writing this post after posting a 'bug' which Sean P was quick to respond to, however I now believe it was ultimately my error in using the swatches/palettes panels. I do though, also believe that if the way swatches and palettes are implemented in Affinity were refined it could be much easier to work with colour not to me