How to change the color tone of the Ambiance theme? [duplicate]

What you're experiencing is a known bug (Lauchpad, Adobe). Because of it you're seeing some Youtube videos with blue tint.

For more information and a fix see this question: Flash video appears blue

This is easily achieved using the themes in ambiance-colors. (There is also a radiance-colors theme if you prefer the radiance theme.) To install:

sudo add-apt-repository ppa:ravefinity-project/ppa
sudo apt-get update
sudo apt-get install ambiance-colors

After this, use either Ubuntu Tweak or MyUnity or Gnome Tweak to change themes. You'll find in the list of themes - in all of those tools - a number of new ambiance themes, such as ambiance-blue, ambiance-red, etc. Make sure to change the theme both under "Window Theme" and under "GTK Theme."

The user in the picture has also installed an icon theme that uses blue folder icons, but I don't know which icon theme it is (although it might be HumanityBlue). There are a number of them, though. (If you search Google under "Ubuntu icon theme" you'll find quite a few. I use Faenza, but there are many others available.)

The colors used by the DASH, panel and launcher background are generated from the wallpaper they cover. To change theme colors there are three files you need to edit.

/usr/share/themes/{theme name}/gtk-3.0/gtk.css
/usr/share/themes/{theme name}/gtk-3.0/settings.ini
/usr/share/themes/{theme name}/gtk-2.0/gtkrc

In the beginning of these files you'll find 4 pairs of core foreground and background colors used in applications based on the gtk 2 and gtk 3 libraries. Pair base_color and text_color are used for the document or text entry portions of windows where bg_color and fg_color are are used for the windows area where icons and labels are displayed. Selected pair is for selected text and the tooltip pair is used for the tips that pop up when you hover over a button or link. These colors may be applied by applications with varying opacity or shadings. The color of text in buttons comes from the fg_color. These sets of labels appear in all three files so I've been changing all three to be the same for any label I change. Here's an example of what I changed in the gtk.css file in the Ambiance theme.

/* default color scheme */
@define-color bg_color #cdc3b8;
@define-color fg_color #262626;
@define-color base_color #accdff;
@define-color text_color #262626;
@define-color selected_bg_color #01b9fc;
@define-color selected_fg_color #ffffff;
@define-color tooltip_bg_color #A3D0FF;
@define-color tooltip_fg_color #023C79;

I believe the ubuntu Tweak tool can help you with that.

https://launchpad.net/ubuntu-tweak/

under optimisations/-themes