These types of sounds always relate to most reviews here but not sure what they mean. Can someone help?

V-shaped = Bass and highs emphasis, mids recessed in comparision
 
Coloured = A bit similar to distorted I'd say but colored has just a less negative ring to it. Some people enjoy a "colored" sound, ie non-neutral/accurate/non-true to the original sound such as Grado's "in-your-face" treble or Sony Xtra Bass series huge bass response for example and that's where I'd use the word colored rather than distorted as distorted is a word that includes so many kinds of distortion and the kind of distortions that are generally disliked about just about anyone, is where I'd rather use the word "distorted" even though the definition of it is similar.
 
Dark: Highs are veiled/recessed, leading to a smoother/warmer sound, lack of "sparkle".
 
Veiled: Similar to above, mostly used about the highs, recessed, hidden behind the bass and mid frequencies.