Usually Tren is the darker, brown to golden amber to almost super dark amber rust colour sometimes, quite unique but looks very beautiful... Colour is not always a good indicator but whenever it has happened to come with Tren, the reputable UGL labs I use were always darker with their Tren and it fucking absolutely kicked ass in results... I've also seen "Tren" that came out looking like Yellow normal looking Test does but the carrier oil was supposedly resulting in everything comming out white like water, but would be simply due to the carrier oil I assume.
That being said Bayer Primoteston 250mg Test E is water clear, but thick as fucking mud which sucks unless blending it into a vial of something else, I would expect Tren, even brewed right should never come out clear, all the good Tren I have used is always obvious and unique compared to all the other AAS from the same UGL which were all typically light, oil, yellowish tinge type oil. And this is the expensive, get what you pay for but sleep at night knowing that for a fact.
Post up a photo anyway, not for lab ID, but if you got it, won't make a difference really unless there was something wrong with the lab or it happened to be a known fake. If you're not sure, always best to check