What can be a synonym for "too much of something" ?

Hey there everybody, I hope you're doing great!

Of course the reason why I am here is simply to find out a synonym for the phrase: "Too much of something".

For instance:

Your room has "too many dark colours" .

I am looking for a synonym that would replace the phrase "too many", it could sound like:

"The synonym word here use of dark colours in your room is tiring on the eyes."

Thank you very much, and of course have an awesome day!