I'm gonna play devil's advocate: That looks like a Fluke DMM knockoff. They could have easily gone with red, orange, green, or some other color I'm sure.
It would be nice if they got a warning first though.
It would be nice if they got a warning first though.
https://cdn.sparkfun.com/assets/home_page_posts/1/4/2/8/DMM_...
Red especially is used by many companies for DMMs, it's a safe color. There's also different hues you can use, maybe burgundy, or even stripes. My point is, this color yellow is similar to Fluke yellow, and that's without proper lighting or color calibration.
http://www.circuitspecialists.com/digital-multimeters
For example, this is a very popular budget meter, Circuit Specialists have been selling it for many years (I have one that's 7 years old):