Adobe removed the colour bright yellow from colour palette i want it back

Hi @Ricky37895644zgb2,

Hope you are doing well. Thanks for writing in!

Are you using a phone or a tablet for using Acrobat Reader Mobile? The reason for asking this, is a recent update from Google which has allowed more color options on the tablet compared to a phone. 

If this is the case, we can get this checked with the team.