The colours in RN are not helping me. I am colourblind. This does NOT mean I don't see colours, but I have trouble recognizing colours that are close to eachother in the spectrum. Most colourblind people would benefit if you would choose colours that are more apart from eachother.
Green = online now; use a darker green!
Yellow = Online within the last 3 days; use really bright yellow
Orange = Not online within the last 3 days; use blue
Red= Not online within the last 7 days; use black
doesnt have to be this way, but just use colours that stand out more! Or use symbols, patterns, etc. Just look here: How to Design for Color Blindness
Hope you will do something about this.