Is there a deep blue star in the universe?

I think the dark blue star you said should be a blue star, so why does it look dark blue?

Because of its high temperature, we know that the temperature of the sun is hot enough, and its temperature is really dwarfed by the temperature of the sun.

The light spectrum of the sun belongs to G type, and the temperature is between 5000 Kelvin and 6000 Kelvin. The spectrum of blue star is O-type, and the temperature is much higher than 25,000 Kelvin. You can imagine it has how bright. Such a high temperature makes its surface look dark blue. The temperature of the sun is obviously not as high as it is, and it looks yellow and white.

Blue star has another feature. If an astronaut observes it in the universe, the blue light passing through the astronaut's eye membrane will make it have a "chromatic aberration illusion", which often makes it feel blue. In fact, most of its light is light blue.

I hope it helps you! ! !