Interesting thought about adding some pattern to this. I don't have any patterned tights (up until recently I rarely wore skirts) but I'll keep my eyes open.
This is not a dress, by the way. I don't have any dresses, as the fit issues drive me nuts. This is my equivalent of a LBD, a straight black skirt with a black top. Does pretty much the same job.
Suz, the two blues are actually quite different. One tilts toward royal blue, the other toward teal. On the other hand, I find that different shades of blue will often work together very well, so I will probably try combining the two one of these days and ask for forum input. Unless I don't like it all on my own.
I have absolutely no idea why some over-the-top things, like this box of crayons, I find very appealing, while others make me uncomfortable. I would never colour block with orange and pink, for example. Patterned tights, unless the pattern is very subtle and fine, I am also uncomfortable with. I have no rational explanation for this.
I am glad to see though, that I am not the only one who enjoyed the combination. And honestly, I did.