Custom contrast colors not working + question about Invert colors

You created a great plugin Volkov! My problem is the same one as the guy below. However, I’ve seen you ask other users to create their own topic, so here I am.
The contrast option worked fine with the built-in options, but when I added custom colors, the button to “choose” from them, does not do anything. Actually, I believe the problem is elsewhere, cause I choose the custom colors, click on “save colors”, and then on “update options”, but when the page reloads, sometimes some of the colors are gone. Sometimes only one of them is there, while the other 3 simply disappeared. In other tries there were 2, or 3, even the 4 of them, but the plugin is not working, and when I reload the admin page they eventually disappear.

Here’s the printscreen you wanted:
https://drive.google.com/file/d/0B0kOLBBDBV19QXJWYXdHcmt4OU0/view?usp=sharing
The url from the site:
http://3lobos.org/

Furthermore, when I was using the standard contrast colors, I was able to choose and everything would be almost perfect (with the exception of the logo and the sides). However, when I clicked a link to go to the next post or to a different category, some parts have their background in the original color (but the sides are the way I wanted).
Here is the SS after you turn on contrast:
https://drive.google.com/file/d/0B0kOLBBDBV19UTZ6ZkFoXzNNOEE/view?usp=sharing
And here is after you advance to a different post:
https://drive.google.com/file/d/0B0kOLBBDBV19Zi1mRGdOeTlmTlk/view?usp=sharing

Actually, I wanted to use only the Invert Colors function, because it’s simply perfect for me (with the exception of some images that I would like to know how to block from the inversion), but since the cookies do not carry on in that option (or so I read in the forums here), I’m having those problems with the contrast options.

I use Google Chrome Version 56.0.2924.87, but I’ve also tested that with Microsoft Edge and Firefox Developer Edition.

So either option would be great to help me, although the cookies in the Invert would be my choice. Not that I’m demanding anything, as I don’t have the right to. I appreciate the help and the plugin.