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.
Like this
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.