In a 10" scope, the only colour you will regularly see is in stars, such as red, yellow, white, and blue (blue as you see in an electric spark).
In nebulae*, colour depends on three factors: 1, how colour blind you are; 2, the age of your eyes; 3, the size of your scope.
In a 10", no matter how young your eyes are or how good your colour rendition is, there is no chance to see colour. That you can get colour in a photograph from a tiny aperture is only due to the time exposure.
Colour would require an aperture starting around 16"/17" if your eyes are young. I saw pale pink and blue in the Orion nebula when I first got my 17.5", some five years ago. Today I can't say I can anymore.
Colour otherwise is only seen in the largest of apertures. I know of one fellow who owns a 40" scope and also with a passion for astro sketching like myself, who routinely sees colour in nebulae, both emission and planetary. But there we are talking about a 1m telescope!
* There are a few exceptions. Planetary nebulae as many of these will display a distinct bluish/green colour. M42 is bright enough that it too can appear bluish/green, here depending on the quality of colour rendition of your eyes. Bright reflection nebula can show blue - I saw a distinct purplely/blue colour in M20 with my 17.5" - most extraordinary as purple is one colour our eyes just don't see at low light levels, but there it was!
Galaxies - no colour. They are just not bright enough. But, with the closest/largest ones, it is possible to distinguish between the stellar continuum and the H2 regions where stars are being formed with the use of nothing more than an OIII filter.
A 10" will begin to show the spiral arm structure of the largest/brightest of the spiral galaxies, such as M31, NGC 1365, and M83 (real tough with this one though). Alas, aperture is KING when it comes to galaxies.
Why no colour? The colour is there - we see it is there because of photos. But our eyes are just not sensitive enough at such low levels of light that we only see things in shades of grey. It is not a fault of the telescope, nor the eyepieces, or any other bit of gear. All to do with having
human eyes.
Please don't be too disappointed - photographs give a totally wrong impression about how things actually look like through a telescope. The result being too many people who buy a brand new telescope are quickly 'pissed off' by it as they cannot see objects through it as they appear in the pretty pictures,
