A lot of the shops/brands I like seem to either
i. offer the exact style season after season in a very similar colour
ii. offer different styles but in the exact same colour season after season
For example, I absolutely love Seasalt's Shears Skirt - fits me really well, great material etc. but having offered a navy blue last year, they are now doing it in purple and teal - different but so close in tone to the navy (in the same colour family) that I don't see any point in buying one of those. Would have loved a camel, or a red, or even a mustard.
Or White Stuff, who seem to settle on a couple of colours every season and then repeat that in several different items. A cardigan, a jumper, a jumper with pockets, a jumper dress... all in the exact same shade of grey, made of the same yarn. I might buy the different items otherwise if I really like the styles but don't really want to have more than one thing the exact same colour.
Boden is also guilty for seemingly always having the same options in their basics. When are they going to do black basic jersey tops?! It's always navy or navy/ivory stripe or grey marl... And they do it with skirts too, very similar colours every year.