I wanted a miniature construction cone that can stack with others.   I actually use these when one of my cats pukes as a caution sign for anyone else in the house to avoid until it can be wet vacuumed and fully cleaned.

For different layer colors I use the switch filament option in the slicer.  

• Write down the total layers
• Figure out how many layers the base is.
• Subtract the total layers from the base layers which gives you how many layers in the cone part and divide by how many transitions you want.
• Add the layer thickness measurement to the base count to give you the first layer change.
• Continue adding the layer thickness count each time.

Suggested print settings:

• Infill: 100% - as there isn't much wall thickness and a heavier base is nice
• Layer Height: 0.2
• No supports should be needed.