"Chat Format": "<color=#838383>[<color=#80D000>{message}</color>] {message}</color>",

You have {message} twice. ^

if you could do it and then paste the edit list and add this color that would be greatly appreciated
#ff0000ff

"Chat Format": "<color=#ff0000ff>{message}</color>",

so? "Chat Format": "<color=#838383>[<color=#80D000>{message}</color>]

Merged post

okay can you post the new config so i can just copy and paste pls im sick of screwing with it all day it works then i brakes 

It is not that complicated. Take a look at the default format:

"Chat Format": "<color=#838383>[<color=#80D000>DeathNotes</color>] {message}</color>"​​

The chat format simply is what the plugin prints to chat, replacing certain placeholders.
These color tags you see simply turn anything inbetween to another color, e.g. "<color=#80D000>DeathNotes</color>" would print "DeathNotes" in green. #80D000 are hexadecimal digits describing the color. You can use a color picker like https://html-color-codes.info/old/colorpicker.html to generate those.

Now in your case you said want to remove the colored [DeathNotes] title in front of the message;
that'd be "[<color=#80D000>DeathNotes</color>]".

When you now go ahead and remove that part you'll end up with

"Chat Format": "<color=#838383>{message}</color>"​​

which now only contains the {message} placeholder surrounded by color tags resulting in just the death message colored grey.

I hope I was able to explain it well enough.
Otherwise you can download the default configuration file with above mentioned changes here.