Within the Switch widget programming, there are two files mentioned for LED color. One is "images/common/led_green.png" and the other is "images/common/led_black.png". Have looked at the backed up configuration file, and on the SD Card, but can not find them.
Saw a README within the Overlays folder that mentioned the green or yellow status LEDs on Programs. Close, but that only counts when playing horseshoes.
Sorry, I worked too long within the power industry where the desired status was to show green for "ready to run" or "red for running". Happiness was seeing an all red board meaning we were producing product or making revenue.
I would never have considered making this change except to my eyes the green LEDs are hard to step back, see a screen full of Switch widgets, and find the one or few greenies among all the black and gray.
I will need to make a "...red.png", and refer to it where green is now, and then swap out the black LED png with the green LED png reference. Might even consider making the green a different shade or intensity to make it stand out.
Unfortunately, there is not much I can do about the mobile app. Way beyond my understanding to modify. But go figure, it has red for running, and the ON status is embellished, but it has black for stopped or not energized. So, so close...