Kittens changing colors/coat pattern

[Jemima Lucca]

My kittens had the cutest stripes when they were younger but it seems like the older they get the more their tabby stripes disappear . Why would this happen? Two of the pics are of them young and two I got today so you can see the difference..I noticed they’re getting lighter and luccas coat is turning silverish.

 

[lutece]

They are lovely! How old are they now? It's normal for a cat's coat to go through many changes on the way to adulthood. Long coat can often make the tabby pattern difficult to see.

Brown tabbies vary in ground color from a rich orangey brown, to a cold grayish beige. Lucca's coat appears to have more of the cold beige ground color. A silver tabby would have a white to off-white ground color, and would be white at the base of each hair.

 

[Jemima Lucca]

Jemima is almost 8mths and Lucca is 4 1/2mths. Where Lucca looks like silver cotton candy lol it’s light down to his skin, but the spine and tail is dark all the way down. But both of them have got less defined tabby type markings. Like it’s just sort of blended together

 

[lutece]

If his dark markings are dark all the way down, he is a brown tabby, not a silver tabby. His color may become warmer as he matures, or he may just have a colder ground color than Jemima.

As for the patterns, you'll just have to wait and see how they develop, as they are still quite young. It's common for mackerel tabby longhairs to have indistinct patterns due to the long coat blurring the markings together. Their tabby markings might become more or less distinct with maturity. You may also be able to see their tabby markings more clearly during the summers, when the winter coats shed out and their coats lie flatter.