Replacement Defrost Switch

[e24mpwr]

The defrost switch on my M635 died last night (I'd actually thought about switches like this croaking earlier in the day...), and the replacements don't look like they'll be yellow. I haven't popped it out yet, but is the yellow color from the bulb or did they move to a different color at some point?

[DesktopDave]

I think it's just the color of the button plastic, it's not evident until the backlight is on. I don't recall for sure if they used a tinted translucent plastic cover like on the dashboard bulbs.