Try this out and see if it works for you.

BB-Skin-Large-Color-on-Black.zip

The skin includes the PSD templates you can open with GIMP
The PANELS folder in the color behind the icons you can change them to whatever color you like also set the Black layer in the PSD to that same color.

Copy the Skins folder "Large Color on Black" to bb\Data\CustomSkins
Copy the Large Color on Black.csc to bb\Data\Schemes

(In older BB
Rename C:\bb\Data\Images\MainScreenButtons\ > MainScreenButtons - Gray
Extract the folder Large Color on Black and Rename > MainScreenButtons)

Start BB
right click the chord sheet > Display Options (or Options > Preferences > Display)

Choose Skin > Large Color on Black
Load Scheme > Large Color on Black

If you don't choose the Large Color on Black Scheme and want to keep the white chord sheet in Display Options
up the top left choose Mixer Font and set it to a color other than black.

EDIT: the Mixer Font isn't saving in the Scheme at the moment so you will need to change in manually.

I look forward to trying this out. You always come up with really novel and useful ideas.

See how you go with it if you have any suggestion for color icon/schemes let me know.
I will update the psd templates to make it easier to add your own icons and colors.
In the pic below I changed the PANELS bmp's to a light color and then added the same color for the background of the icon.
The File ones are done I just need to do the others below.
So using GIMP anyone should be able to create their own skin.
I couldn't get the background transparency for the icons to work like the bmp pink as the png icons are transparent around the edges and the pink bleeds through thus showing pink around the edges.

This is great! However will this work with BiiB 2022? If not, any idea where I can find a dark skin for 2022? Thank you!

Welcome to the forum.

I see no reason why this would not work on version 2022, since to my knowledge, nothing in this area of the program has recently changed. However, be aware that you should make backups of any file you change and any file you create, since updates may overwrite your changes.

It works in the 2022 version just fine.