The visible portion of the electromagnetic spectrum encompasses wavelengths from approximately 380 nanometers (nm) to 750 nm.

Here's a breakdown of the approximate wavelengths associated with different colors:

* Violet: 380-450 nm

* Blue: 450-495 nm

* Green: 495-570 nm

* Yellow: 570-590 nm

* Orange: 590-620 nm

* Red: 620-750 nm