Hi,
It's been a while that I've been looking for the dye combination or the name of the dye to have this color but unfortenaly i didn't found so if someone know please i put the picture below.
I tried to ask the person on the screen but she/he is offline unfortunately 
thank you in advance
Hum... I'm not sure this color (ghostly blue) is replicable
I think that's one of the color you can only get on the very old obsidian monk armor that were crafted before 2006.
You can find more info on this reddit post
Color chart of the prenerf monk obsidian armor :
ok ty it was prenerf dye if i look on your image.
it's pink dye pre nerf is that?
No i think it's a regular pink dye but on a prenerf armor. So if you obsidian armor is older than 2006 then i'm afraid you can't get this color.
ok ty for answer if a moderator can close the topic please
