Change color scheme based on the currency.
It's not easy to see if we're on a G1 or G1-test Cesium client.
It can be problematic as it's easy to create my mistake create a member account on G1 while trying to make one on G1-test. It already happen in an "Apéro Monnaie Libre" even while paying attention (maybe a bug causef a G1 Cesium to open, we don't know).
To avoid any ambiguity, the color scheme of Cesium could change based on the "Currency" field. To avoid hard-coding a color scheme for each new currency, an idea is to take the hash of the "Currency" field and use it to calculate the hue of the interface, and use the contrast/brightness to make all interface colors.