You're asking about the similarities and differences between three colored stars, which implies you're referring to stars that appear to have different colors. The color of a star is a direct indicator of its surface temperature. Here's a breakdown:

Similarities:

* All are stars: They are all massive celestial objects that generate light and heat through nuclear fusion.

* All are composed of mostly hydrogen and helium: These are the main elements that fuel nuclear fusion.

Differences:

* Temperature: This is the primary factor determining a star's color.

* Blue stars: Hottest, around 30,000 K or more.

* White stars: Moderately hot, around 7,500 - 10,000 K.

* Red stars: Coolest, around 3,500 K or less.

* Mass: Blue stars are generally the most massive, while red stars are the least massive. This relates to their temperature; more massive stars have more gravity, which compresses their cores and drives hotter fusion reactions.

* Lifetime: Blue stars burn through their fuel much faster than cooler stars, resulting in shorter lifespans (millions of years). Red stars can live for billions of years.

* Luminosity: Blue stars are the brightest, emitting far more energy than red stars.

* Spectral Class: Astronomers classify stars based on their spectral lines, which are related to their temperature. Blue stars are class O or B, white stars are class A or F, and red stars are class K or M.

Important Note: The colors we see in the night sky are often influenced by our atmosphere. A star's true color can be best observed from space.

Let me know if you'd like me to elaborate on any of these points!