You could colorize the message in the minibuffer with
(message (propertize "foo bar" 'face '(:foreground "green" :weight bold)))
I would apply this only to the confirmation message of writings. The green color will help me to clearly distinct errors and confirmations from the minibuffer.
However, the confirmation message is different every time. So the confirmation message in the minibuffer could be like :
When searching around on Emacs Stackexchange, there are various ways to surpress or display another message. But they assume it's a static string message. It's not. The message differs each time, it's depends from the path/filename where the buffer will be stored.
Is there perhaps any way to recognize it's a write confirmation message, catch it, colorize it, and pass it further to the minibuffer?