Deleting colour presets

Has anyone found a way to delete colour presets that aren't needed any more? I can't see anything within FCPX, perhaps a file somewhere on the system that can be edited?

Color presets are stored in user's videos folder/Final Cut Events/ Color presets.

Thanks Fabian, nice and simple. I had a feeling I was going to have to search through some hidden text file or something for the relevant lines.

A related problem on this old thread: I want to delete Title text style presets - does anyone know how? Thanks!

I ran into the "delete Title text style presets" a few days ago and it did drive me crazy.

Quit FCPX/Motion
In "~/Library/Application Support/Motion/Text Styles" delete all files.
Delete all Motion Prefs
Delete all FCPX prefs

All text styles should reset to standard (unfortunately other stuff as well)

-Andreas

One of the things that should be improved about FCPX. This should all happen within the program.

I've to revise the things I said a few hours ago - at least partially.

The way described may work, but unfortunately FCPX seems to store those things in projects (events sometimes) as well.
So making a project with that "garbage" visible for FCPX brings back that "garbage" again without the style previews.

Some background:
If you create a home-made Title Effect in Motion the Style popup by default shows "Normal" for the font settings and you apply all those settings in the Inspector you need, these settings will be applied to the "Normal" which can be called in FCPX later (this is valid for most of the free Title Effects you can get).
Depending on the location where the template is saved there are differences.
If they are stored on root level a FCPX crash can destroy/change this list of styles easily and worse add some more bad styles to it. Even more worse it will apply these "bad" settings to all of the effects used in any event/project you have open and save those automatically.
So once you have set up a "virgin" system and load one of the "auto-saved" projects (not those in the backup folder) the garbage is back again. Also keep in Mind that in this case FCPX doesn't these think these events/projects are defect and will try to load them as normal and after 15 minutes it may overwrite the probably correct backup file with the "defect" one as backup.

-Andreas