These have a heel but are much more comfortable than some of my flat boots
They come in a host of colors
You might find a deal on them via amazon if you stalk them
Pikolinos Verona is the model name
Def the most comfy boots I've owned
Also the Aquatalia sweeties are super comfy but more expensive. I found mine at more than half off so you could watch for sales too
Obviously these are suggestions you didn't even ask for but hope they help nonetheless