Me too, I've had 'Torties' for over 25yrs now (only one at a time mind) my first one 'Kissa' had 2 litters of Kittens one Ginger Tabby and a Black with Tabby markings that you could only see in certain light (as shades of 'blue' black and 'brown' black) as her first (I kept the Ginger Ninja) and the 2nd litter was 3 Black and White (2 girls and a lad) and another Ginger lad (we kept one of the B&W girls)
Kizzy on the other hand has never had Kittens.
Those are what are known as "ghost markings" and all self cats will have them. That's because all cats are genetically tabby, even if the gene for agouti is "turned off" by having a pair of recessive genes for non-agouti. A cat only needs one copy of the agouti gene to physically express tabby markings.
In the right light, I can see that Lexi has mackerel tabby ghost markings, even though she is a blue self & white.
Torties are different, because even though they have the recessive genes for non-agouti (as evidenced by the black / blue / chocolate / lilac bits), the ginger bits will still show the tabby pattern, as the gene for red behaves a bit funny and is never truly non-tabby.
Underneath her tortie coat, Poppy has classic tabby markings with the butterfly across her shoulders and the oysters on her flanks.
White is the only cat coat colour that completely masks tabby (and any other colour / pattern for that matter).