Yep! If you hex color your patterns in blue it makes it redyable.
But I was able to just color my pattern directly onto the file, I did that by adding another layer of light blue (selected from the blue options on the sprite sheet) set the layer to add, made another layer and made it multiply (this is the layer I colored my design on!) and it worked out just fine for me. it'll be different colors once uploaded in the pattern shop but then you go to Saliko village and change the colors up. I'm sure tobias will explain it more clearly then I can!!!