Just for future reference, when a design will be coming, I just thought about a site logo:
The form should be obvious. Beside the nod to the original SE logo, talking to each other is the main endeavor in politics.
Political opinions have always been metaphorically expressed as colors. We cannot avoid that, so the only solution is to embrace it. At the same time, including transitions between colors is acknowledging the power of weighing those opinions. Using the full color palette is a sign of not being entrenched in a for-and-against dichotomy or restricted to a two-party system.
As a reference for designers, here is the source code to the logo. (image upload does not support vector images.)
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
<path d="m1 7a2 2 0 0 0 2 2v3l3-3v-2z" fill="#c00000"/>
<path d="m1 4v2h5a3 3 0 0 1 0.75-2z" fill="#800080"/>
<path d="m3 1a2 2 0 0 0-2 2h9a2 2 0 0 0-2-2z" fill="#0000c0"/>
<path d="m7 10a2 2 0 0 0 2 2h1l3 3v-3a2 2 0 0 0 2-2z" fill="#ffd000"/>
<path d="m7 7v2h8v-2z" fill="#b0c800"/>
<path d="m9 4a2 2 0 0 0-2 2h8a2 2 0 0 0-2-2z" fill="#00c000"/>
</svg>