Color of subtitles in FF

[Simon]

I don't really understand the Subtitle colour parameter. I just want plain and simple subs, white ideally. Currently I have them white but they are 'flaring' very bright, bold and somewhat blurred. The current colour setting is a box at the start of a string which is white then [255,255,255], (255). Is there a 'normal' setting for just plain white perhaps by changing other settings?

[Selur]

no clue what FF is (FFmpeg?), but [255,255,255] is only white if your video uses full luma scale, which isn't true for most video,..