Question about "Light Pink" in Channel Box

[ku0020]

Does anyone know the meaning of "light pink" color in channel box?

While I was animating, my keying suddenly stopped working. I can put key, let's say on 1st frame, by pressing "Shift + W, E..." or "S". HOWEVER, if I put key on 10th frame, something weired happens. I can put key, but the previous key on the 1st frame is gone.

Actually, it's not exactly being gone. Key is there. Graph editor shows some curve. But there is no animation even if there is some curve.
Also, channle box value is not changing at all even if there is a curve shape in graph editor.

The reason why is... channel box is filled with "light pink" color. According to Autodesk, this means "key altered", but they did not explained anymore, or just I could not find the page. 

I have no idea how I created this "altered key." I can resolve this weired trouble simply by restart maya.

BUT, I really like to have proper explanatin about this "light pink" trick...  

[zukran-zolo]

Did you ever find out anything about this?

[charliewales]

It means that those channels are driven by animation curves. Red means the channel has a keyframe at the current frame, light pink means that the current frame does not have a keyframe (thus it is being interpolated and "altered" by the animation curve).

[davymaxwell3d]

Red = Key
Pink = Keyed on another frame
Light Pink = controlled by a curve

In the Graph Editor, select the curves that are keyed Light Pink only, from the Curves tab choose Change Rotation Interp --> Independent Euler. This should give you tangents to manipulate the graphs AND set the keys in the channel box back to Red.