I wouldn't worry about matching small appliances. Do you intend to leave them out on the counter all the time? I don't use my KA mixer nor my toaster a lot so they live in a cabinet.

I agree with the previous poster. If others don't like your kitchen they don't have to look at it and stick your tongue out at them as you walk away with head held high :). Just kidding, however at the end of the day if you like it, it's all that matters.

I think mixing colors in a kitchen can look great when done correctly. Small appliances in a color are a great way to add pops of color to your kitchen without the color becoming overwhelming. You will want to make sure the colors you choose to mix coordinate well with each other and don't mix too many colors or it will be too much. Stick with 2 or 3 accents that you really love. It sounds like you already have the 2 colors you are considering in your dishware. Even if that is normally hidden behind cabinet doors, when people are over and you are using the dishes it will all still coordinate together. I say go for it. A mix of colors is fun and will make you happy about your space.

Keep to one colour family for a professional seamless look

Go with what you like as you will live with it daily. If it puts a smile on your face go for it.. Life is to short to worry about how appliance colors look together.