Suggestion: Improvements for the rank/chat colors of Staff and Ultimate members.
I'll try and keep this short and simple:

Revert Mod chat color to match with Helper color as it used to.
- Mod rank will stay as green but the chat text will change back to yellow. Edit: Or the mod rank and the brackets around the rank can be yellow as well so that it is different from helper.
- Mod chat text is currently dark aqua which is difficult to see in shout in contrast to the other colors.
- This removes an unneeded color out of the Meepcraft rainbow.
Switch the SuperMod chat and rank colors with those of Ultimate.
- SuperMod ends up with orange rank color and orange chat color. It is a warmer color than yellow, and leads up to the red admin color. Makes sense right?
  - It is still an easy to see color so no worries over our community not seeing our SuperMods.
  - Edit: The brackets around the rank could be orange as well.
- Ultimate members end up with a dark aqua rank color and aqua chat color.
  - This is an enticing set of colors which will add incentive for players to donate to Ultimate.
  - There are too many players not willing to donate after getting up to Supreme because they'll end up with a dull color after having such an attractive one while Supreme.
  - Also makes sense as Supreme has dark purple rank color and light purple chat color. Dark to light.
Edit: Make adjustments to the server broadcasts.
- Change the server broadcast color from yellow to gray. The yellow blends in with the helper chat. Gray is still a visible color thus being a good replacement for yellow.
- Server broadcasts comes on too frequently, increase time between broadcasts.
- Remove ctf win messages from broadcasts. Only adds spam to shout.
- Remove parkour claim prizes from broadcasts. Only adds spam to shout.
- Remove spleef win messages from broadcasts. Only adds spam to shout.
- Remove official meeper broadcasts and set it so only the person whom completed the tutorial sees that message. Only adds spam to shout.

Edit: Here are visuals for anyone who is having trouble en-vising the suggestion (credit to Supershot12 for providing the images).

It took a while, but I recreated what the chatlog formats would look like for each rank since the forums colored chat unfortunately just doesn't properly match what it looks like in the game. The following is what each standard player rank would look like:
In an extremely odd regular day, this is what the chatlog might look like if I was on a political rampage:
Based off of the suggested chat, my personal suggestions are:
Change the "official meeper" messages to gray - they clutter the chatlog with yellow and make it harder to read the yellow staff member chat.
Highlight the ClearLag warnings of some sort. Changing the "Warning" label or the number of seconds left to red/dark_red would help players to see this message and avoid dropping items, even if the red color was only on the 20 seconds warning.
Change the standard Meep-Shouts to gray. This will further reduce the clutter of yellow in the chatlog which will make staff member messages much more noticeable; this will be especially necessary if Mod chat will be changed to yellow.
Use the first color method. In my opinion, a yellow rank tag combined with a yellow chatlog text color simply doesn't look well combined.
If said suggestions were to be applied, the chatlog would look like this:
[EDIT 1] Edited as to make the multi-line player text indented as it normally is on Meepcraft (when it works) :p
~ @Supershot1200

Why would your suggestion benefit Meepcraft?: It would provide more incentive to donate to Ultimate and make our current Ultimate members happier with their rank. This would also allow Mods' chat to be seen easier and provide a clear identity of those who are staff members. Staff will end up with warm colors representing their caring passion for the server.
Who would this benefit?: The whole community as it will provide clearer identification on staff members and incentive for players to donate to Ultimate as well as satisfy those currently Ultimate. Donations = Running Server.
About how long will this take to be implemented, if it is accepted?: A few minutes at most.
Would this cause more lag?: Not at all.