Use RGBA keyframe for one of the color components

[chkworks]

In any other track it is possible to use the handle to set the value of the type. Would it make sense to use the handle of the RGBA type to set either the hue, saturation, value or alpha of the color? Maybe the value would be a good choice by default, with the option to change the behaviour for the whole track in the inspector?

Also I am asking myself why the color is not filling the whole track area, would look even fancier :)