Why 128gb and 200gb SanDisk Ultra micro sd cards are black colored and new one - 256gb is red/ gray?

[sonyzz]

most of the Sandisk Ultra micro sd cards were red/gray but thoose two are black, have both of them - both working - genuine tested with H2testw but i wonder why?

 

[atljsf]

because they look prettier like that?

 

[sonyzz]

because they look prettier like that?

at first i thought that Sandisk 256gb micro sd card is fake because its not black with red writing, then i did some research and found that they made 256gb card