Can a theme be set via the command line when starting btop?

[gm1168]

Looking at the man page for btop, it looks like there are no command line switches to allow a theme to be set (vs. what is in the btop.conf file). Is there a command line option for setting the theme, or would that require an enhancement request?
Thank you.

[HealthyPear]

you can press the 'm' key to enter the options and change it from there so you can see in real time how it looks