ajnasz-blue.ini

[skin]
    description=Ajnasz Blue Theme. Midnight Commander skin from Ajnasz.

[Lines]
    horiz=─
    vert=│
    lefttop=┌
    righttop=┐
    leftbottom=└
    rightbottom=┘
    topmiddle=─
    bottommiddle=─
    leftmiddle=├
    rightmiddle=┤
    cross=┼
    dhoriz=═
    dvert=║
    dlefttop=╔
    drighttop=╗
    dleftbottom=╚
    drightbottom=╝
    dtopmiddle=╤
    dbottommiddle=╧
    dleftmiddle=╟
    drightmiddle=╢

[core]
    _default_=blue;default
    reverse=black;brightblue
    selected=white;brightblue
    marked=yellow;gray
    markselect=gray;yellow
    gauge=lightgray;blue
    input=white;blue
    header=lightgray;

[filehighlight]
    directory=lightgray;
    executable=brightgreen;
    symlink=cyan;
    stalelink=red;
    device=brightmagenta;
    special=yellow;
    core=red;

    temp=gray;
    archive=magenta;
    source=green;
    media=;
    graph=;
    database=brown;
    doc=cyan;

[dialog]
    _default_=black;brightblue
    dhotnormal=cyan;black
    dfocus=brightblue;black
    dhotfocus=white;black

[error]
    _default_=white;red
    errdfocus=red;white
    errdtitle=red;white
    errdhotnormal=red;white
    errdhotfocus=blue;green

[menu]
    _default_=black;brightblue
    menuhot=cyan;black
    menusel=birghtblue;black
    menuhotsel=cyan;black

[buttonbar]
    hotkey=cyan;
    button=black;brightblue

[editor]
    _default_=lightgray;
    editbold=default;
    editmarked=blue;gray
    editwhitespace=blue;
    linestate=;
    bookmark=white;red
    bookmarkfound=black;blue

[help]
    _default_=black;lightgray
    helpitalic=red;lightgray
    helpbold=blue;lightgray
    helplink=white;lightgray
    helpslink=white;blue

[viewer]
    viewunderline=brightred;

[widget-common]
    sort-sign-up = '
    sort-sign-down = ,

[widget-scollbar]
    first-vert-char=↑
    last-vert-char=↓
    first-horiz-char=«
    last-horiz-char=»
    current-char=■
    background-char=▒

interesting... i just was searching for something similiar but in my case i get this error "Error: imposible process skin, it load default skin", i add skin=ajnasz-blue or with full path but in both cases get error

I set skin in following way:

skin=/home/user/.local/share/mc/skins/xtheme.ini

where user is name of your user, xtheme is name of color sheme
and it works fine for me (Linux Mint 17.3, MC 4.8.11)

@ ivanchoff :
use this command line to work:
mc -S ~/.config/mc/skins/ajnasz-blue.ini

and you can create alias to add this by default...

also obtained from "man mc":
A skin-file is searched on the following algorithm (to the first one found):

          1) command line option -S <skin> or --skin=<skin>
          2) Environment variable MC_SKIN
          3) Parameter skin in section [Midnight-Commander] in config file.
          4) File /etc/mc/skins/default.ini
          5) File /usr/share/mc/skins/default.ini