In previous versions of vanilla Minecraft servers, it is known that any pink-colored text is the operator's message. Any other player's text would be all white, thus making the operator's messages more distinctive and appealing to other players online.

However, as of the latest 1.4.2 version, there is no distinctive text color that represents the operator's message. Instead of having the text in its usual pinkish hue, it is now white.

Other than /say command, the /me command also lost its distinctive pink color. Even though there are different message tags in the front of each message sent, it would be nicer and more appealing if the texts were colored.

The "whitetext.png" image depicts how a typical /say command in the server console shows up in Minecraft. The "metext.png" image depicts how a typical /me command in the server console shows up in Minecraft.

Update 1: I have attached a third image, labeled as "text.png", which shows the multiplayer settings I use when the server messages are sent to the client. As you can see, the server message is still white beneath the dark overlay.