I think that the 2020 presidential election will finally be when we’ll see colors other than red, white, and blue showing up as main branding colors in a mainstream candidate.
The 2016 election and people’s response to Trump paved the way for “outsiders” and given people permission to color outside the lines.
I’d love for that to lead to a fracturing of the two party system into dozens of smaller parties, but I don’t think that is going to happen anytime soon. We’ll have to settle for more exciting campaign branding. Baby steps.