Usually, the color of fractals is determined from the number of iterations calculated before the termination condition. However, if you include the distance of the last two calculation results, you can specify the number with decimal places and achieve a uniform coloration.
This are some color changing rotating spirals, which may look like made out of balloons. For rendering this on your graphics card only very few lines of code are required.
It is time do some WebGL stuff again. And here it is. Some spiraling spirals with a minimal amount of code.