Trido,
Welcome to IIS
Colour in images is because the light is transmitted in colour and a camera can "collect" this light over time and register it as colour. Our eyes, on the otherhand, cannot "collect" the light so it never gets intense enough to stimulate our colour sensors which need lots of light. The dull light only stimulates the black and white sensors so we only see most of the astro objects in B&W through the scope. However, bright objects like the moon and planets and some nebulae show colour.
Cheers