Hi everybody,
1. What is the name of this thing on the wall:

?
As I can see those black things are hooks but I can't say the name of the thing that hooks are mounted on. 'Wall-mounted hook rack'?
2. What is the adjective if I would like to describe something that has one colour? 'Single-coloured'? I found the word 'self-colour' in Oxford Dictionary but it isn't in other dictionaries:
http://oald8.oxfordlearnersdictionaries.com/dictionary/self-colourThanks for your answer in advance.