Most galaxies and nebulas will appear silvery grey and if you're lucky some nebulae may look pale blue green. Unfortunately our eyes aren't very sensitive to color when the light is dim. Stars, on the other hand, show color quite well. The subtle blue, yellow, green and red colors of individual stars can be seen.
Some people are more color sensitive than others.
Don't despair if you can't see color. The planets show colors, but the colors are subtle and muted. Getting the most out of a telescope is a learning experience and takes time. Don't expect to find everything you search for. Life would be boring if we all had the same interests and opinions.