Filters- Editing

Many of the shots in my film are too sunny and bright and therefore don't fit in well with the thriller genre because it makes the film seem too happy and upbeat. To solve this I am attempting to put filters on certain shots to make them darker and less bright. However it is very difficult to find the correct filter without making the shots look too over edited. I will keep playing around with the different filters and hopefully find one with the correct balance of light and dark colours.