I have 3 new feature suggestions

1-"Hide Messages"
We should be able to use "/hide" command to hide our message from people. Hidden messages will not be shown to people with no authorization to see it. (It will look like the message never has been sent) Admins can change the channel or role settings to give people authority to hide messages.
2-"Hide Messages in the Channel"
Admins should be able to change channel settings to hide all the messages in that channel unless it is the message of the person viewing the channel or the message is pinned. The setting can be like making the channel "Age-Restricted Channel" or like giving people "Read Message History" authorization. (Personally, I'm more on the side of making it a authorization so you can decide who can see the messages in that channel without "Administrator" permission.)
3-"Colorful Messages"
We should be able to send message in colors that we choose. When making messages in "Bold" with **Like This**, we should be able to also add a color to that bolding **:a#0000ff:Like This**. Coloring is done by Color HEX and there are 3 options where you can choose for that coloring: All, adding letter a before Color HEX to make coloring visible to both white and dark mode; Dark, adding letter d before Color HEX to make coloring visible to only dark mode; White, adding letter w before Color HEX to make coloring visible to only white mode. You can also color white and dark differently **:d#0000ff,w#ffff00:Like This** to prevent the visual differences of different modes make the colorful messages hard to read. Admins can also change the server or role settings to prevent people from sending colorful messages. People also can turn off messages getting colorful by their Accessibility settings if they don't want to see it.
//Note: The last suggestion can also be Nitro Exclusive, though I do not recommend and I do not prefer it, but it should make Discord Nitro more attractive to purchase/subscribe.

Thank you for reading my post and I would like to see these features getting a place in Discord. Huge Thanks to Discord Developers.