Great question. Yes, light is made of photons. What THOSE are, however, nobody exactly knows. Light remains a mystery. Einstein once said I'd like to spend the rest of my reflecting on what life is. So you're in good company.
Other colors such as red through purple are bounced off of objects. For example, a green leaf adsorbs all colors except green, and the green rays (the mix of blue and yellow) bounce off, resulting in that particular visible spectrum appearing there. Also related to that, black clothing absorbs all light which means it can get very overheated at times which is why they say not to wear black/dark clothing in the summer.
light, visible electromagnetic radiation. Of the entire electromagnetic spectrum, the human eye is sensitive to only a tiny part, the part that is called light. The wavelengths of visible light range from about 350 or 400 nm to about 750 or 800 nm. The term “light” is often extended to adjacent wavelength ranges that the eye cannot detect—to infrared radiation, which has a frequency less than that of visible light, and to ultraviolet radiation and black light, which have a frequency greater than that of visible light. If white light, which contains all visible wavelengths, is separated, or dispersed, into a spectrum, each wavelength is seen to correspond to a different color. Light that is all of the same wavelength and phase (all the waves are in step with one another) is called “coherent”; one of the most important modern applications of light has been the development of a source of coherent light—the laser.
Light is a weird phenomenon. The current understanding is light is a a transmission of energy in packets called photons. Here's the bizarre part, ligtht can act like a particle that you can shoot when it wants to AND it can act like a wave like a sound wave or a ripple in a pond. Beyond that, it gets too complicated for me. If you want to think of it basically, think of light as energy in a visible form.
Light is Energy in the form of an Electromagnetic field. This is the least complicated answer. Other above have given more detail to be technically correct.
