Expecting a change in color

Does anyone know about how long it takes a colored plant to take on its blue or purple color? I'm growing a blueberry plant and I was just curious. Thanks

Blueberry doesn't really take on a blue color from what I know. It sometimes gets a blueberry smell and or taste, but no blue buds.

Color is a genetics thing. Some seeds that are "purple" will turn out green. Others from the same mother will turn out purple. Sometimes cooler temps will cause a change in color.

i find that purple strains or coloured strains dont really get much colour indoors but if u take them outside in the last few weeks they will change colour i dont know why thuis si but it has worked with me in the past