hahaha
Every Flag

Yeah. Maroon is made with the color red, no?
So that means that this color is red:
https://www.colorcodehex.com/01ffff/
It technically has red. On a hexagonical scale, it has a red of 1, a green of FF (255), and a blue of FF (255). It looks cyan, but looks can be deceiving, it is actually red.
And this is also red:
https://www.colorcodehex.com/010000
As a matter of fact, it has nothing but red. No green. No blue. Just red. The red value may only be one, but without a doubt, it is still red
The flag of Mauritania used to be green and gold only
but very recently (Aug 2017) they added red stripes.
However, the decision was controversial and many still consider the old flag as the true flag.