IPL Skin Tone chart
Never use any hair removal device if you have dark skin. Both Lasers and Intense Pulse Light devices are attracted to dark colours. This is why it works for darker hair and not the lighter hair colours. If you have dark skin the device can easily burn your skin.
So looking at the skin tone chart below, we can see the the lighter skin tones are all ok, but not the darker colours.
IPL Hair Colour chart
With IPL and Laser hair removal, the lights are attracted to dark colours, so the darker the hair, the more effective the device will be. The devices are not effective on lighter hair colours like light blonde, grey, red or white hair. The devices are most effective on darker hair colours from mid blonde, blonde, light brown to brown and black.
So looking at the hair colour chart below, we can see the darker hair colours are all ok, but not the lighter colours.