As i said before the results of colour are not reliable, dont worry about what colour it is... the colour of ketone varies on the method used to make it, and even then there is a fair amount of variance...
Personally i have had yellow, dark orange, light brown (sort of golden syrup colour), fluro yellow (that was cool!) and red.
I have never seen blue, but heres the link to the page with the picture, weird but is a good example of what i mean when i say its not reliable enough to work on colour of the ketone.
https://www.thevespiary.org/rhodium/Rhodium/clandestine/nasa/index.html (https://www.thevespiary.org/rhodium/Rhodium/clandestine/nasa/index.html)
Ketone --> https://www.thevespiary.org/rhodium/Rhodium/clandestine/nasa/ket2.jpg (https://www.thevespiary.org/rhodium/Rhodium/clandestine/nasa/ket2.jpg)
-AC