* Visible light is made up of all the colors of the rainbow. We call this a spectrum, and it ranges from red (longest wavelength) to violet (shortest wavelength).
* When we see "white" light, it's actually a mixture of all these colors. Think of sunlight: it appears white, but it contains all the colors of the rainbow.
* Combining all the visible colors of light together DOESN'T create something NEW, it just gives us white light again. It's like mixing all the paints in a rainbow together to get a muddy brown – you're not creating a new color, you're just losing the individual colors.
So, to answer your question directly: All of the visible color light waves together result in white light.