neotree和all-the-icons，在neotree中显示的文件夹图标自动使用theme的前景颜色。 想给它一个自定义的颜色。
1、all-the-icons-faces.el 给出了颜色定义，应该如何调用呢？
(defgroup all-the-icons-faces nil
"Manage how All The Icons icons are coloured and themed."
:prefix "all-the-icons-"
:group 'tools
:group 'all-the-icons)
;; red
(defface all-the-icons-red
'((((background dark)) :foreground "#AC4142")
(((background light)) :foreground "#AC4142"))
"Face for red icons"
:group 'all-the-icons-faces)
(defface all-the-icons-lred
'((((background dark)) :foreground "#EB595A")
(((background light)) :foreground "#EB595A"))
"Face for lred icons"
2.all-the-icons.el给出了文件夹图标的定义。但是都没给定颜色定义。
(defvar all-the-icons-dir-icon-alist
'(
("trash" all-the-icons-faicon "trash-o" :height 1.2 :v-adjust -0.1)
("dropbox" all-the-icons-faicon "dropbox" :height 1.0 :v-adjust -0.1)
("google[ _-]drive" all-the-icons-alltheicon "google-drive" :height 1.3 :v-adjust -0.1)
("^atom$" all-the-icons-alltheicon "atom" :height 1.2 :v-adjust -0.1)
("documents" all-the-icons-faicon "book" :height 1.0 :v-adjust -0.1)
("download" all-the-icons-faicon "cloud-download" :height 0.9 :v-adjust -0.2)
("desktop" all-the-icons-octicon "device-desktop" :height 1.0 :v-adjust -0.1)
("pictures" all-the-icons-faicon "picture-o" :height 0.9 :v-adjust -0.2)
("photos" all-the-icons-faicon "camera-retro" :height 1.0 :v-adjust -0.1)
("music" all-the-icons-faicon "music" :height 1.0 :v-adjust -0.1)
("movies" all-the-icons-faicon "film" :height 0.9 :v-adjust -0.1)
("code" all-the-icons-octicon "code" :height 1.1 :v-adjust -0.1)
("workspace" all-the-icons-octicon "code" :height 1.1 :v-adjust -0.1)
("test" all-the-icons-fileicon "test-dir" :height 0.9)
("\\.git" all-the-icons-alltheicon "git" :height 1.0)
("." all-the-icons-octicon "file-directory" :height 1.0 :v-adjust -0.1)
))
-
init.el
(add-to-list 'all-the-icons-dir-icon-alist '("media" all-the-icons-faicon "random" :height 1.0 :v-adjust -0.1 :face all-the-icons-red))
自己添加了"media"文件夹的图标，并指定了颜色。可以正常工作的。怎样把 all-the-icons-dir-icon-alist 中所有的文件夹指定 :face all-the-icons-red 呢？