Yeah, what a chicken ...
There is still so much stuff that we will probably never know about them. Like the colour of the scales and feathers or their actuall voice, the colour of their eyes and so on.
Funny you'd mention, with very recent technology, color can be deducted from extremely complete feathered specimens. Color in living tissue is a molecular behavior, and by anticipating what behavior fits what color, this can then be analyzed in the fossils: Different molecules degrade at different velocity, and are thus replaced by different minerals over time.
With this knowledge, scientists have managed to completely "color" at least ONE dinosaur, while others we know slight color patterns, such as "dark overside, light belly", which is pretty typical for animals.
This is the one we know the colors of exactly:
We also see striped tails in small carnivorous dinosaurs, which is also typical for long-tailed animals, like lemurs. The stripes "break up" the animal shape, and help camoflage.
As for voices, it's more tricky, but at least with duck-billed dinosaurs with "trombone"-like nasal structures, most famously Parasaurolophus, their "voice" has been reproduced. However, HOW they used their voice is of course not know, and will never be