You need to go to the custom CSS thingyjiggy and change the height of one of the properties in it.
7bb0bd is the color you used, so type ctrl + f and put "7bb0bd" in the search and it should direct you to the correct thing unless you have more than one with the "7bb0bd" color, then you find which one.
I forgot which block this is, so I can't tell you off hand, lol.