Apparently blue, black and red are harbor freight best sellers and yellow and orange are the worst. This of course is based solely on the sale prices shown.
When I purchased my 5 drawer cart, they had five yellow, 5 orange, 2 green and the blue/black/red were on backorder. Doesn’t phase me, I love the yellow.
I have the orange top, bottom and side cabinet 44 inch. And the orange single bank cart. Orange isn’t what I wanted but I needed a box and blue, red and black and green weren’t available only yellow or orange and I got the last orange stuff so I’m not complaining lol. Blue is my preference though. I have the blue 5 drawer cart at home.