Nico Nico Hosei Cafe, "Appetite-Decreasing Blue Curry," good, but bright sky blue, it's blue!
The blue-colored "Appetite-Decreasing Blue Curry" can be found at Cafe TEAROOM2525 on the second floor of Nico Nico Honsha in Harajuku, Tokyo. The base is white curry. It is dyed an eye-popping sky blue with petroleum-based coloring.