Dark Mode UI keeps the base UI look but darkens most aspects of it. Added in a few more features that add flavor but maintain the original aesthetic. Created for Classic WoW Season of Mastery and later ported over to Classic TBC!

Customization Features:

Thick Frames
Flat Bar Textures
Class Health Bars
Smooth Corners Cast Bar
Class Portraits
System Stats Tracker (fps/ms)
Show Party Frame Buffs
Buff Borders (Toggleable for those that want to identify the debuff type quickly to assess decurse, purify, etc opportunities)
Format Health and Mana Values to show Current Values
Hide Stance Bar (Turns invisible)
Hide Pet Bar Background
Hide Player Bar Hotkeys
Hide Pet Bar Hotkeys
Leatrix Enhanced Quest Log
Add outlines to names and health/mana values and scale the font sizes

Recommended addons:

Modern TargetFrame and FormatFix - Two addons that show target frame hp and mana values, and then formats them to show the current value only

Leatrix Plus - Hides chat frame buttons and adds many more quality of life features

KuiNameplates or any nameplate addon of your choice - Changes the base UI nameplate since this addon does not address that frame

Bartender4 or Dominos - Action bar addons that are supported but won't darken their art frames

Font:

Create a folder named Fonts in the same folder that has your WowClassic.exe file. The directory path should look something like this /ProgramFiles/World of Warcraft/_classic_era_/ (_classic_ for TBC)

Look up a font called Prototype and download it from dafont.com. Unzip the .zip file you just downloaded. Make 4 copies of the Prototype.ttf file, you can discard the Prototype.txt file.

Copy the 4 Prototype.ttf files you have to the Fonts folder and rename each as one of the following:

ARIALN.ttf

FRIZQT__.ttf

MORPHEUS.ttf

skurri.ttf

Credits:

Big thanks to Lorti, Chordsy, and Sinope, for Lorti UI which built the base for this addon.

Syiana from SUI for the thick frames, raidframes, castbar, and system stats tracker.

lks_grift from FormatFix for the clean formatting that shows current health and mana values.

Wish I could find the name of the ForgeUsers that made the classportraits originally to give them credit.

And finally, thanks to DahkCeles and plusmouse from the WoWUIDev Discord server that helped me set up configuration options for user customization and properly darkening the stopwatch frame.

Known issues: Can't seem to darken the Inspect, Auction, LFG/LFM (in SoM), Class Trainer, and Socketing Gems (in TBC) Frames

Dark Mode UI (Classic WoW)