Complex sentence: Process color (and similar terms) refers both to a method of reproducing colored images on printing presses and to the specific printed colors that bluish-green, magenta is a bright purplish-red, and yellow is a clear, bright yellow.
Split into simpler sentences: Process color (and similar terms) refers both to a method of reproducing colored images on printing presses and to the specific printed colors that result from that method. Cyan is a bright bluish-green, magenta is a bright purplish-red, and yellow is a clear, bright yellow.