If only your RC is red, you are fine. I have understand there are different versions of RC on market, will go fine.
Mine also is red, but works OK.
My method of upgrade at last FW was:
1. Uninstall old app
2. Install new app SKY
3. Log-in
4. Start update by Wifi
5. Blocked at 50%....hash...damn...coffee...
6. Restart drone and RC
7. Hit again Update...is possible to give you strange messages like "Cannot do that as drone is flying!"

)))...no worries, try again, again, again.
8. I did managed to start update again after 3 attempts, all giving me that drone is flying (was on floor).
9. 100% completed, green solid lights on both. Restarted both.
10. You may have RC in About -> Firmware in red color, is not an issue as I have understand.