orange or yellow
Hale-Bopp comet appeared as a bright bluish-white color to observers on Earth. This color was due to the gases and ices present in the comet's nucleus reflecting sunlight.
the color of a comet is light blue or dark blue
Green-Blue
Halley's comet appears blue due to the emissions of vaporized gases, such as carbon, nitrogen, and oxygen, as it interacts with ultraviolet light from the sun. The ionization and excitation of these gases cause them to emit bluish-green light, giving the comet its characteristic blue glow.
The green color of a comet is caused by the gases it releases, such as diatomic carbon and cyanogen, which emit green light when they interact with sunlight.
Orange black, white orange/red.
You probably mean the comet that was recently seen in the southern hemisphere. It was green because of the particular ions in the gas of the tail. The name of this comet is Comet Lemmon (C / 2012 F6).
Do you mean lighter in color? Halley's comet has an albedo of about 0.04, which is the color of tar. Our Moon has an albedo of about 0.07, which is the color of weathered asphalt. If you mean lighter as in less massive... we've never seen a comet as massive as our Moon, but there are some pretty tiny moons out there in the outer solar system; a few comets might be larger than some of them.
a comet/meteorite
Halley's Comet appears as a bright, glowing object with a visible tail of gas and dust. It has a distinct blue-green color due to the gases surrounding it. The comet's appearance can vary depending on its distance from the Sun and Earth.
It is a comet.
Halley's Comet