I sometimes struggle with the color choices and combinations due to being mildly color blind to reds browns and greens. A red blinking indicator on a brown sub is very hard to see. I literally have to look for the change in motion, not the addition of color. I can only see the difference if I zoom all the way in and look closely.
I know there is a mood you're going for, so bright primary colors probably won't work, and changing shapes is weird.
As a half measure, could you at least outline the red blinking dot in white or something?