Political colours fun & 'prez cancer

(3) A party may choose up to six colours to represent itself. Each colour must be of a single wavelength, which is to be written in the party's Charter.
(4) Because the colour pink cannot be produced by light beam of a single wavelength, it is not allowed to be a party colour.
(5) A party cannot choose a colour that is outside of the range of 300 ~ 800 nm (approx., see Appendix A for specified constant under "Political-party approved light wavelengths").

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Note (4) was created because a party, who took pink as a colour, once took to the Grand Command Room and ordered a systematic assassination of up to ½ of the total population. After a particularly bloody civil war, it was declared that it would be in everyone's best interest to simply squirrel it away except in documentaries, all Germany-like.

Note (5) was created because a party once declared a colour in the gamma ray end of the EM spectrum to be its party colour. As a result, the presidency, when the Great House contains that party, receives a rather unappealing dose of 10 mSv/hr. This is commonly called "'prez cancer".

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Initially the idea was that a party would show its colours with coloured bits of glass on a gas lamp. That evolved into lights with a plastic filter, and then lasers atop a slightly cloudy Taxman's Fluid.