This is a color animator that has a correct interpolation in the HSV 3D space.

The algorithm makes a standard 3D math interpolation between two 3D points and thus it allows to make a visually perfect color shift.

The usual direct interpolation of HSV values results in a stranger behavior, in example you can see a blink of red color while you're interpolating from blue to white.

Just copy/paste the class into your project: AnimatedColor.java

    AnimatedColor color = new AnimatedColor(Color.RED, Color.WHITE);
    int resultColor = color.with(0.5f); // [0..1] delta

While this algorithm is OK for usage in a usual Android application, it is not as efficient as is should be for usage in games. You may probably want to make use of temporary static variables instead of allocating small float[] buffers every time with is called.