I used to use McMyAdmin but ran into some issues awhile ago, so went looking for another backend, found MultiCraft. Instantly loved it. Problem, came with too bright of themes, Then around the net there were no other themes I could fine, the 3 I did find were also bright or with dark trim, and one that looked like default was selling for $20???
So here you go. I grabbed my notepad and went to work - my CSS is super rusty, but I think it turned out ok. let me know. I do work on this when something about it bugs me (no pun LOL), but for now it looks OK and it is a more easy on the eyes theme.
Again it is free, if you ever see it anywhere DO NOT BUY IT.
Also this is still a work-in-progress. But felt it was at a stage worth releasing
To install on Windows:
Navigate to C:\\Multicraft\vendor\\multicraft\panel\themes