someone know how to edit the (color) of the tibia letters?
The only way to customize the Tibia client is by editing it through a Hex Editor.
For this purpose, you can use XVI32:
One of the best free hex editors
xvi32.en.softonic.com
1 - Open XVI32, click on File/Open... and select the Tibia executable.
2 - Press CTRL + F, select Text String, and enter what you want to edit (Example: #a85e32) this color is orange, but I'm not exactly sure, you should check online to confirm. If there is no 'hex color' inside the client, then you should look for a function, I believe it's 'TALKTYPE_ORANGE_1 = TALKTYPE_MONSTER_SAY TALKTYPE_ORANGE_2 = TALKTYPE_MONSTER_YELL' but I'm not sure which one is correct.
3 - When you find it, you need to replace the letters (Example: #32a83e or the function mentioned above), to delete some numbers you should press the spacebar, or change the value on the left side of the Hexadecimal table to 00.
Be cautious:
You must not delete ANYTHING, absolutely NOTHING. If you press backspace and delete any character, it will cause issues, and the client won't open anymore!
You can only replace the letters; you can't increase the size, just as you can't delete because you can't increase it either.
I recommend that you should use Otclient; it's the SOLUTION! Much better than the Cip client.