Today I took a sample of 10 ml from Toyota DOT3 Brake Fluid and another 10 ml from the car's brake fluid reservoir. I am not sure what to make of it. The new DOT3 fluid is almost clear, it is not possible to notice it in the photo due to background (do not have any other photo) but it does have a very slight yellowish colour while the old fluid from car is very dark.
The question, the new DOT3 colour is supposed to be lightly yellow? and it becomes dark as it ages? or how does it go? Here is the comparison, left is new, right is old.

P.S. If anyone ever performs this procedure, please take care with the syringes. It is possible to take off the needle part and do the process with just the plunger which is what I recommend. If you have to use it including the needle part then make sure you are up for it. Remove the plastic cover from needle ONLY & ONLY when you take it to top of the bottle/reservoir and put it on/back as soon as you are done. Just pull it from the bottle/reservoir and put the cover. You do not want to "inject" yourself empty or worst, with Brake Fluid :).