diff --git a/alacritty/.gitignore b/alacritty/.gitignore
new file mode 100644
index 0000000..b669464
--- /dev/null
+++ b/alacritty/.gitignore
@@ -0,0 +1,5 @@
+# Generated by `./install`
+/alacritty.yml
+
+# Symlink created by `../bin/set-colors`
+/colors.yml
diff --git a/alacritty/alacritty.yml b/alacritty/base.yml
similarity index 94%
rename from alacritty/alacritty.yml
rename to alacritty/base.yml
index c9d5e62..ee4a291 100644
--- a/alacritty/alacritty.yml
+++ b/alacritty/base.yml
@@ -90,51 +90,6 @@ render_timer: false
 # and cursor.background colors, otherwise invert the colors of the cursor.
 custom_cursor_colors: false
 
-# Colors (Tomorrow Night Bright)
-colors:
-  # Default colors
-  primary:
-    background: '0x000000'
-    foreground: '0xeaeaea'
-
-  # Colors the cursor will use if `custom_cursor_colors` is true
-  cursor:
-    text: '0x000000'
-    cursor: '0xffffff'
-
-  # Normal colors
-  normal:
-    black:   '0x000000'
-    red:     '0xd54e53'
-    green:   '0xb9ca4a'
-    yellow:  '0xe6c547'
-    blue:    '0x7aa6da'
-    magenta: '0xc397d8'
-    cyan:    '0x70c0ba'
-    white:   '0xffffff'
-
-  # Bright colors
-  bright:
-    black:   '0x666666'
-    red:     '0xff3334'
-    green:   '0x9ec400'
-    yellow:  '0xe7c547'
-    blue:    '0x7aa6da'
-    magenta: '0xb77ee0'
-    cyan:    '0x54ced6'
-    white:   '0xffffff'
-
-  # Dim colors (Optional)
-  dim:
-    black:   '0x333333'
-    red:     '0xf2777a'
-    green:   '0x99cc99'
-    yellow:  '0xffcc66'
-    blue:    '0x6699cc'
-    magenta: '0xcc99cc'
-    cyan:    '0x66cccc'
-    white:   '0xdddddd'
-
 # Visual Bell
 #
 # Any time the BEL code is received, Alacritty "rings" the visual bell. Once
diff --git a/alacritty/colors-dark.yml b/alacritty/colors-dark.yml
new file mode 100644
index 0000000..ed246f6
--- /dev/null
+++ b/alacritty/colors-dark.yml
@@ -0,0 +1,27 @@
+colors:
+  # Default colors
+  primary:
+    background: '0x1d1f21'
+    foreground: '0xc5c8c6'
+
+  # Normal colors
+  normal:
+    black:   '0x282a2e'
+    red:     '0xa54242'
+    green:   '0x8c9440'
+    yellow:  '0xde935f'
+    blue:    '0x5f819d'
+    magenta: '0x85678f'
+    cyan:    '0x5e8d87'
+    white:   '0x707880'
+
+  # Bright colors
+  bright:
+    black:   '0x373b41'
+    red:     '0xcc6666'
+    green:   '0xb5bd68'
+    yellow:  '0xf0c674'
+    blue:    '0x81a2be'
+    magenta: '0xb294bb'
+    cyan:    '0x8abeb7'
+    white:   '0xc5c8c6'
diff --git a/alacritty/colors-light.yml b/alacritty/colors-light.yml
new file mode 100644
index 0000000..14a7ae9
--- /dev/null
+++ b/alacritty/colors-light.yml
@@ -0,0 +1,27 @@
+colors:
+  # Default colors
+  primary:
+    background: '0xf3f3f3'
+    foreground: '0x303030'
+
+  # Normal colors
+  normal:
+    black:   '0xdadada'
+    red:     '0xf32840'
+    green:   '0x059b00'
+    yellow:  '0xf06d14'
+    blue:    '0x337ada'
+    magenta: '0xac37f5'
+    cyan:    '0x0ababe'
+    white:   '0x707070'
+
+  # Bright colors
+  bright:
+    black:   '0xb3b3b3'
+    red:     '0xad1d2f'
+    green:   '0x345a09'
+    yellow:  '0xb44900'
+    blue:    '0x024299'
+    magenta: '0x63039f'
+    cyan:    '0x008a86'
+    white:   '0x909090'
diff --git a/alacritty/install b/alacritty/install
new file mode 100755
index 0000000..b99af79
--- /dev/null
+++ b/alacritty/install
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+CURDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+inputs=(
+    "${CURDIR}/base.yml"
+    "${CURDIR}/colors.yml"
+)
+output="${CURDIR}/alacritty.yml"
+
+cat "${inputs[@]}" > "${output}"
diff --git a/bin/day-mode b/bin/day-mode
new file mode 100755
index 0000000..4fdafe1
--- /dev/null
+++ b/bin/day-mode
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+CURDIR="$(cd "$(dirname "$(realpath "${BASH_SOURCE[0]}")")" && pwd)"
+exec "${CURDIR}/set-colors" light
diff --git a/bin/night-mode b/bin/night-mode
new file mode 100755
index 0000000..17a6140
--- /dev/null
+++ b/bin/night-mode
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+CURDIR="$(cd "$(dirname "$(realpath "${BASH_SOURCE[0]}")")" && pwd)"
+exec "${CURDIR}/set-colors" dark
diff --git a/bin/set-colors b/bin/set-colors
new file mode 100755
index 0000000..a241889
--- /dev/null
+++ b/bin/set-colors
@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+# "Automate" flipping applications between light and dark themes.
+
+DOTFILES="$(cd "$(dirname "$(dirname "$(realpath "${BASH_SOURCE[0]}")")")" && pwd)"
+
+scheme="${1:-dark}"
+
+if [ "${scheme}" = 'dark' ]; then
+    ln -sf "${DOTFILES}/alacritty/colors-dark.yml" "${DOTFILES}/alacritty/colors.yml"
+    ln -sf "${DOTFILES}/vim/colors/jdkaplan-dark.vim" "${DOTFILES}/vim/colors/jdkaplan.vim"
+    "${DOTFILES}/alacritty/install"
+elif [ "${scheme}" = 'light' ]; then
+    ln -sf "${DOTFILES}/alacritty/colors-light.yml" "${DOTFILES}/alacritty/colors.yml"
+    ln -sf "${DOTFILES}/vim/colors/jdkaplan-light.vim" "${DOTFILES}/vim/colors/jdkaplan.vim"
+    "${DOTFILES}/alacritty/install"
+else
+    echo "Unknown color scheme: ${scheme}"
+    exit 1
+fi
diff --git a/default.conf.yaml b/default.conf.yaml
index f560d11..0cd033d 100644
--- a/default.conf.yaml
+++ b/default.conf.yaml
@@ -2,6 +2,7 @@
     - mkdir -p ~/.config
     - mkdir -p ~/.config/direnv
     - mkdir -p ~/.task
+    - ./bin/set-colors dark
 
 - clean: ['~', '~/.config']
 
diff --git a/neovim/init.vim b/neovim/init.vim
index c7769f3..22d98eb 100644
--- a/neovim/init.vim
+++ b/neovim/init.vim
@@ -59,9 +59,6 @@ set number
 set hidden
 set ruler
 
-set t_Co=256
-
-set background=dark
 colorscheme jdkaplan
 
 set expandtab
@@ -326,3 +323,12 @@ smap <C-k> <Plug>(neosnippet_expand_or_jump)
 xmap <C-k> <Plug>(neosnippet_expand_target)
 
 let g:gutentags_ctags_executable_rust = 'rusty-gutentags'
+
+" CTRL-L usually clears and redraws the screen.  Might as well use it to reset
+" the colorscheme too!
+fun s:ResetScreen()
+    colorscheme jdkaplan
+    redraw
+endfun
+command ResetScreen call s:ResetScreen()
+nnoremap <C-l> :ResetScreen<CR>
diff --git a/vim/colors/.gitignore b/vim/colors/.gitignore
new file mode 100644
index 0000000..64e3029
--- /dev/null
+++ b/vim/colors/.gitignore
@@ -0,0 +1,2 @@
+# Symlink created by `../../bin/set-colors`
+/jdkaplan.vim
diff --git a/vim/colors/jdkaplan.vim b/vim/colors/jdkaplan-dark.vim
similarity index 90%
rename from vim/colors/jdkaplan.vim
rename to vim/colors/jdkaplan-dark.vim
index 9d27d71..767cde2 100644
--- a/vim/colors/jdkaplan.vim
+++ b/vim/colors/jdkaplan-dark.vim
@@ -1,18 +1,17 @@
 " Vim color file jdkaplan
 
-set background=dark
 hi clear
 if exists("syntax_on")
 syntax reset
 endif
-set t_Co=256
+set background=dark
 let colors_name = "jdkaplan"
 
 hi Comment              cterm=none      ctermfg=145
 hi Constant             cterm=none      ctermfg=141
 hi Cursor               cterm=none                  ctermbg=255
-hi CursorLine           cterm=none                  ctermbg=0
-hi CursorColumn         cterm=none                  ctermbg=0
+hi CursorLine           cterm=none                  ctermbg=232
+hi CursorColumn         cterm=none                  ctermbg=232
 hi Directory            cterm=none      ctermfg=33
 hi ExtraWhitespace      cterm=none                  ctermbg=160
 hi Folded               cterm=none      ctermfg=220 ctermbg=59
@@ -44,5 +43,3 @@ hi Whitespace           cterm=none      ctermfg=239 ctermbg=235
 
 hi ALEWarningSign                       ctermfg=184 ctermbg=238
 hi ALEErrorSign                         ctermfg=160 ctermbg=238
-
-hi DeniteMatched   NONE cterm=none      ctermfg=184 ctermbg=235
diff --git a/vim/colors/jdkaplan-light.vim b/vim/colors/jdkaplan-light.vim
new file mode 100644
index 0000000..cd80450
--- /dev/null
+++ b/vim/colors/jdkaplan-light.vim
@@ -0,0 +1,45 @@
+" Vim color file jdkaplan
+
+hi clear
+if exists("syntax_on")
+syntax reset
+endif
+set background=light
+let colors_name = "jdkaplan2"
+
+hi Comment              cterm=none      ctermfg=243
+hi Constant             cterm=none      ctermfg=63
+hi Cursor               cterm=none                  ctermbg=232
+hi CursorLine           cterm=none                  ctermbg=255
+hi CursorColumn         cterm=none                  ctermbg=255
+hi Directory            cterm=none      ctermfg=26
+hi ExtraWhitespace      cterm=none                  ctermbg=160
+hi Folded               cterm=none      ctermfg=220 ctermbg=242
+hi Function             cterm=none      ctermfg=32
+hi Identifier           cterm=none      ctermfg=32
+hi LineNr               cterm=none      ctermfg=244
+hi MatchParen           cterm=none      ctermfg=202 ctermbg=254
+hi Normal               cterm=none      ctermfg=233 ctermbg=254
+hi NonText              cterm=none      ctermfg=110 ctermbg=251
+hi Number               cterm=none      ctermfg=202
+hi PreProc              cterm=none      ctermfg=28
+hi SignColumn                                       ctermbg=242
+hi Statement            cterm=none      ctermfg=28
+hi Special              cterm=none      ctermfg=233
+hi SpecialKey           cterm=none      ctermfg=28
+hi SpellBad       NONE  cterm=underline " TODO
+hi SpellCap       NONE  cterm=underline " TODO
+hi StatusLine           cterm=none      ctermfg=232 ctermbg=245
+hi StatusLineNC         cterm=none      ctermfg=244 ctermbg=251
+hi String               cterm=none      ctermfg=94
+hi StorageClass         cterm=none      ctermfg=136
+hi Title                cterm=none      ctermfg=233
+hi Todo                 cterm=none      ctermfg=196 ctermbg=254
+hi Type                 cterm=none      ctermfg=136
+hi Underlined           cterm=underline ctermfg=233
+hi VertSplit            cterm=none      ctermfg=248
+hi Visual               cterm=none      ctermfg=233 ctermbg=252
+hi Whitespace           cterm=none      ctermfg=244 ctermbg=253
+
+hi ALEWarningSign                       ctermfg=184 ctermbg=249
+hi ALEErrorSign                         ctermfg=160 ctermbg=249
diff --git a/zsh/.zshrc b/zsh/.zshrc
index e6f3382..7ad4003 100644
--- a/zsh/.zshrc
+++ b/zsh/.zshrc
@@ -32,12 +32,12 @@ zle -N edit-command-line
 bindkey '^x^e' edit-command-line
 
 if [[ $TERM =~ '256color' ]]; then
-    local blue="%F{81}"
-    local orange="%F{166}"
-    local purple="%F{135}"
-    local red="%F{196}"
-    local green="%F{118}"
-    local gray="%F{241}"
+    local blue="%F{12}"
+    local orange="%F{11}"
+    local purple="%F{13}"
+    local red="%F{9}"
+    local green="%F{10}"
+    local gray="%F{7}"
 else
     local blue="%{$fg[cyan]%}"
     local orange="%{$fg[yellow]%}"