the chromosphere glows because of the release of hot, low density gases that are emitted from the sun. Normally, it can't be seen by the naked eye due to light from the photosphere blocking it. During a solar eclipse, the chromosphere is visible, appearing as a red ring around the Sun.
The chromosphere of the Sun is pretty bright - but nowhere NEAR as bright as the Sun itself. So we can't see the chromosphere until something blocks the glare of the Sun. It used to be that only the Moon could do that, revealing the luminous outer layers of the Sun, but once we realized what it was, it was easy enough to build the coronoscope, which blocks the Sun's disk while allowing observation of the solar corona.
The chromosphere of the sun cannot normally be seen due to the overwhelming brightness of the photosphere, the layer just below it. It is color pink due to its low density.
The chromosphere is one of the three main layers of the sun.
the chroMOsphere is a layer of the sun, roughly 2000 km in width
the thin gas layer just above the photosphere