From the Merck Index, 12th edition :
"Yellow monoclinic prisms"
I agree, the color should be bright yellow, looks like hydroquinone but yellow. I think usually we see a bit green-yellow because of quinhydrone ( ? ) contamination. Looks like you have a lot of impurities in your product.
I have been trying to make / purify p-benzo via dichromate ( SpiceBoy ), but I have had a lot of trouble also. The final product, after filtering, has a lot of Cr impurities and water, looks muddy, very green ( pea green ) and differently than pure p-benzo, is VERY water soluble. The green color is due I guess to Cr2O3. Yields are easily 140 %, what tells you there is a lot of impurities and H2O. I have tried to purify with DCM, and the final product superficially looks OK, nice yellow, just a hint of green color, dry powder, but there seems to be some residual impurity remaing or generated when using DCM. Twice I had strange results with the Wacker, lots of impurities, solid black tar, low yield, usually 30 % or so. In another occasion similar black tar showed up mixed with the freebase when xtaling, but washed away with acetone. Low yield, though. Benzene seems to work better but yields are low, also difficult to distill out when p-benzo concentration starts to increase. I had to use aspirator vacuum for the DCM as well as for the benzene.
If using the dichromate method, best technique seems to be to dry it WELL after filtering, let it stand inside a glass container with drierite for a few days, might have to change the drierite once or twice. Don't try to purify, use as it is and use a slight excess. I hit 65 % ketone yield on my first try, never was able to repeat that.
Also, black tar etc. never showed up, only when I tried to purify with DCM. Low yields with the Wacker, though.
I think the H2O2 method is a better deal, but I have never tried it myself. I have heard other bees have got quinhydrone instead of p-benzo, it might be very well what you get.
If you can buy it you will avoid a lot of headache, but be careful. I have ordered it once, they call me back and said they needed a statement from me or my company telling them what I was planning to use it for. I said I would do it, then called them back again, said please cancel it, they said OK, no problem. This was about two years ago.
Other bees comments will be very welcome, I have high interest in this topic.