Contrast of brackets is counterintuitive

[volo1st]

The contrast (or colour intensity) for brackets under the cursor annoyed me a lot recently.
The problem as you can see from the screenshots below is: when you moving the cursor, the bracket will blink between frame 1 and frame 2. Even worse, frame 1 comes first and has a darker colour without other visual indications. So my eyes are distracted to focus on the matching bracket instead of the bracket at the cursor position.

Nord bracket under cursor frame 1

Nord bracket under cursor frame 2

In contrast, Gruvbox set it in a more intuitive way:

Gruvbox bracket under cursor frame 1

Gruvbox bracket under cursor frame 2

Probably you guys could consider updating the colour a bit?
Thank you for making such a great suites of colour schemes!

[arcticicestudio]

Thanks for your contribution 👍 and sorry for my late reply.

I've been a bit confused about the light border around the matching bracket on the frame 1 screenshot of the Gruvbox theme. I've checked their code and the vim documentations again to see if I never noticed that Vim supports borders for elements which would solve the problem immediately, but then I recognized that it is just the Block cursor type instead of IBeam which is shown as a empty box when the terminal is not focused 😆

Anyway, I've posted my review of your PR in #78.