This nice looking little plant is definitely concolor, but I think the tag is wrong. The genus name for these plants changed recently, and concolor is associated with attenuata (via var. glabrata), not fasciata. So I would like to propose moving this image to the following entry.

Haworthiopsis attenuata var. glabrata

I will also propose adding concolor as a synonym for this plant, and deleting the concolor synonym from fasciata.

For more on the subject see here:

The thread "The "old" Haworthia concolor" in Plant Database forum

Please let me know if you have any problems with this.