Yes, white dwarfs are generally cool and dim compared to other types of stars. A white dwarf is the remnant of a star that has exhausted its nuclear fuel and shed its outer layers, leaving behind a dense core that no longer undergoes fusion reactions.
Initially, white dwarfs can be quite hot (with surface temperatures exceeding 100,000 K) when they are formed, but over time, they gradually cool down. As they age, their temperature decreases, and they emit less light, becoming dimmer. Eventually, they may cool to the point where they are no longer visible with standard telescopes, becoming what's known as a "black dwarf" (although the universe is not old enough for any black dwarfs to exist yet).
In summary, while white dwarfs start off hot and bright, they eventually become cool and dim over the course of billions of years.