That is going to be a hard question to qualify. You see the color green differently from what I see as green. We both see green but I may not see it with the same clarity that you may see it. Some people have a color deficiency so their response will not have any value to you. You need to look at the pictures and decide for yourself what the best color is for your eyesight. General concensus is that green is best due to wavelength then into the reds.
A pure democracy operates by direct majority vote of the people. When an issue is to be decided, the entire population votes on it; the majority wins and rules. A republic differs in that the general population elects representatives who then pass laws to govern the nation.
Always helpful sir. Thanks.