The visible spectrum is the portion of the electromagnetic spectrum that can be detected by the human eye.
Electromagnetic radiation in this range of wavelengths is called visible light or simply light.
The spectrum doesn't, however, contain all the colors that the human eyes and brain can tell apart.
such as pink, and purple colors such as magenta aren't found as such in
the color spectrum, for example, because they can only be made by a mix
of multiple wavelengths.
The eyes of many species perceive wavelengths different from the spectrum visible to the human eye.
For example, many insects,
such as bees, can see light in the ultraviolet, which is useful for
finding nectar in flowers.
For this reason, plant species whose life cycles are linked to insect pollination may owe their reproductive success to their appearance in ultraviolet light, rather than how colorful they appear to our eyes.
Birds too are able to see into the ultraviolet and the sex-dependent markings on some bird plumage is only visible in the ultraviolet range.
Color displays (e.g., computer monitors or televisions) mix red, green, and blue color to create colors within their respective color triangles, and so can only approximately represent spectral colors, which are in general outside any color triangle.
This is important when viewing sea
glass colors on the television screen or, for that matter,
any colored depiction on color display screens.
In simple terms, there are limits to the colors
that a computer screen can display.
It may be that two different colors with two different name look the same on your computer screen.
Or, if you use a different browser (for example, first looking at a color on Windows Internet Explorer and then the same color on Firefox browser) the color may look slightly different.