I've been asked a few times how to change the color and shading of your yell messages, and it's actually quite simple:
The color is chosen by a code that you can generate here: https://www.mathsisfun.com/hexadecimal-decimal-colors.html
As you can see, I have pointed out the code you want to use. It coincides with the background color displayed behind it.
Next you want to type that code into your yell message. To do this, use the following format: ::yell <f><col="YOUR COLOR CODE HERE">YOUR MESSAGE HERE
You will see your message is now the chosen color! But what if you want it to pop off the background a bit? For this, we will add a second code after our color code. Note: you will need a second color that is different than your color code for this to be effective.
Your first code will be the same, but we will add the <shad="NEW COLOR CODE HERE"> to the message to get this:
::yell <f><col="FIRST COLOR HERE"><shad="SECOND COLOR HERE"> MESSAGE
Our finished product should look something like this:
I hope this little guide helped!