Yes. Some alien races have different eye colors (i.e. red, orange, yellow, green, blue, purple, pink, brown, black, white, etc.).
Yes. Some alien races have different skin colors (i.e. red, orange, yellow, green, blue, purple, pink, brown, black, white, etc.).
Yes. Some alien races resemble anthropormorphic (i.e. humanoid) animals and plants. They come in all sizes and colors.
If alien races do exist, they could very likely have a different colored blood such as yellow.
Yes. Some alien races have two hearts.
Two pupils in the eye would be eerie,and perhaps some alien races have them.
Some alien races, if they exist, may have five arms.
From the data we have, we have not discovered any alien races.
If aliens exist there could be some alien races that have reptavian characteristics.
Yes. Some alien races have multiple heads. But currently, it is unknown.
Yes. Some alien races have multiple hearts. But currently, it is unknown.
Yes. Some alien races have upside-down faces.
Yes. Some alien races have multiple legs. But currently, it is unknown.