On 23/01/2019 00:15, alan_m wrote:
On 22/01/2019 21:04, Steve Walker wrote:

Probably more to do with Red being conventionally for warnings and
prohibitions, while Green is for informative items.

At one time every power on indicator on electronic equipment was neon
and usually red. These days with consumer electronics the favoured
colour seems to be blue and implemented with an eye burning laser!

Blue LEDs are more "modern" as they weren't available (at least
affordably) a decade or so ago. (Nobel prize winning too.)

Some have green for on and red for standby, often in the same component.

--
Max Demian