some gruvbox colour schemes, following the GTK gruvbox i use (B-LB-Dark-Medium), the orange and green is from my material-gruvbox sublime text theme. i think they tie well and i prefer muted gruvbox schemes.
i hope i get the code formatting correct this is how i do it in obsidian and im pretty sure its the same as here, just MD.

grey:

/* Cyberspace Custom Theme */

Base Theme: dark

/* Colors */

Foreground: #c9b58f

Background: #282524

Dimmed: #897b62

Border: #786b5e

Code: #a4af62

Code BG: #282524

/* Fonts */

Main Font: Theme default

Code Font: courier

/* Options */

Disable Text Glow: false

Disable Anti-aliasing: false

Enable Noise: false

Enable Ligatures: false  

orange:

/* Cyberspace Custom Theme */

Base Theme: dark

/* Colors */

Foreground: #dd884d

Background: #282524

Dimmed: #985e35

Border: #786b5e

Code: #a4af62

Code BG: #282524

/* Fonts */

Main Font: Theme default

Code Font: courier

/* Options */

Disable Text Glow: false

Disable Anti-aliasing: false

Enable Noise: false

Enable Ligatures: false