Turning down the contrast.

[mikeumus]

The lines for tabs and the dots for spaces where too bright for all Brackets themes so I toned them down to have less contrast and compared it to SublimeText. If you compare the change to SublimeText you'll notice it's closer to SublimeText's contrast after this change as well. Cheers!

[mikeumus]

Referencing issue #10

[tomByrer]

too bright for all Brackets themes

My background is very bright:

I've had to brighten the colors so they blended in better. So your patch would have been worse for me.
But I understand you don't want the whitespace to stick out too much. Seems the hipster themes are mostly very dark background (aside from the default, which isn't too bad IMHO).

I wish we could override colors in your own custom theme.

[mikeumus]

I see. No worries. :)

[tomByrer]

Yep, you can override with your theme. :)

[mikeumus]

Already did!, 👍 your main.less actually.