animateColor
The color of a group and the fill of two circles part of the group are animated.
The values for color are rgb(0,0,255);rgb(100,100,100);rgb(0,0,255)
indicated by the color of the background.
The values for fill of the large centered circles are blue;currentColor;blue.
The values of the small circle bottom right are blue;rgb(100,100,100);blue,
but this animateColor uses keyTimes and keySplines to get the same visible
effect as the animateColor of the large circle.
Because currentColor changes all the time, the
animation of fill is a quadratic and continuous change
all in the blue range. An error occured for example, if something red gets
visible, if fill is not animated continuously (ignoring the fact that
currentColor has always a RGB value) or if the effect of animation
of fill is not visible (ignoring the animation of color) or if the
animation of the two circles have not the same visible effect.