Hi, just found this and wanted to make an addition as my screen is 2560 x 1440.

So I went searching and found this: 

h t t p s : / / w w w . w s g f . o r g / a r t i c l e / c o m m o n - h e x - v a l u e s

(Remove spaces - only there to beat spam filter?!?)

As these match up with what JJK has listed - you should be able to use it to set any resolution you like.

Cheers!