diff --git a/Makefile b/Makefile
index 470ac86..b095566 100644
--- a/Makefile
+++ b/Makefile
@@ -15,8 +15,14 @@ options:
 	@echo "LDFLAGS = $(STLDFLAGS)"
 	@echo "CC      = $(CC)"
 
-config.h:
-	cp config.def.h config.h
+theme.h:
+	./xtheme
+
+theme_beg.h:
+	./themesetup
+
+config.h: theme.h
+	cp -n config.def.h config.h
 
 .c.o:
 	$(CC) $(STCFLAGS) -c $<
@@ -24,13 +30,14 @@ config.h:
 st.o: config.h st.h win.h
 x.o: arg.h config.h st.h win.h
 
-$(OBJ): config.h config.mk
+$(OBJ): config.h theme_beg.h config.mk
 
 st: $(OBJ)
 	$(CC) -o $@ $(OBJ) $(STLDFLAGS)
+	rm -f theme_{beg,end}.h
 
 clean:
-	rm -f st $(OBJ) st-$(VERSION).tar.gz
+	rm -f st $(OBJ) theme_{beg,end}.h st-$(VERSION).tar.gz
 
 dist: clean
 	mkdir -p st-$(VERSION)
diff --git a/config.def.h b/config.def.h
index 91ab8ca..084710e 100644
--- a/config.def.h
+++ b/config.def.h
@@ -1,11 +1,15 @@
 /* See LICENSE file for copyright and license details. */
 
+/* theme management */
+# include "theme_beg.h" /* this is a compile-time generated header file */
+# include "theme.h"
+
 /*
  * appearance
  *
  * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html
  */
-static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohint=true";
+static char *font = ST_FONT;
 static int borderpx = 2;
 
 /*
@@ -93,37 +97,43 @@ char *termname = "st-256color";
  */
 unsigned int tabspaces = 8;
 
+/* bg opacity */
+float alpha = ST_ALPHA;
+
 /* Terminal colors (16 first used in escape sequence) */
 static const char *colorname[] = {
 	/* 8 normal colors */
-	"black",
-	"red3",
-	"green3",
-	"yellow3",
-	"blue2",
-	"magenta3",
-	"cyan3",
-	"gray90",
+	ST_COLOR0,
+	ST_COLOR1,
+	ST_COLOR2,
+	ST_COLOR3,
+	ST_COLOR4,
+	ST_COLOR5,
+	ST_COLOR6,
+	ST_COLOR7,
 
 	/* 8 bright colors */
-	"gray50",
-	"red",
-	"green",
-	"yellow",
-	"#5c5cff",
-	"magenta",
-	"cyan",
-	"white",
+	ST_COLOR8,
+	ST_COLOR9,
+	ST_COLOR10,
+	ST_COLOR11,
+	ST_COLOR12,
+	ST_COLOR13,
+	ST_COLOR14,
+	ST_COLOR15,
 
 	[255] = 0,
 
 	/* more colors can be added after 255 to use with DefaultXX */
-	"#cccccc",
-	"#555555",
-	"gray90", /* default foreground colour */
-	"black", /* default background colour */
+	ST_CURSORCOLOR,
+	ST_REVCURCOLOR,
+	ST_FOREGROUND, /* default foreground colour */
+	ST_BACKGROUND, /* default background colour */
 };
 
+/* theme management */
+# include "theme_end.h" /* this is a compile-time generated header file */
+
 
 /*
  * Default colors (colorname index)
diff --git a/themes/Cyberpunk-Neon.h b/themes/Cyberpunk-Neon.h
new file mode 100644
index 0000000..d77a229
--- /dev/null
+++ b/themes/Cyberpunk-Neon.h
@@ -0,0 +1,18 @@
+# define ST_FOREGROUND "#0abdc6"
+# define ST_BACKGROUND "#000b1e"
+# define ST_COLOR0 "#123e7c"
+# define ST_COLOR1 "#ff0000"
+# define ST_COLOR2 "#d300c4"
+# define ST_COLOR3 "#f57800"
+# define ST_COLOR4 "#123e7c"
+# define ST_COLOR5 "#711c91"
+# define ST_COLOR6 "#0abdc6"
+# define ST_COLOR7 "#d7d7d5"
+# define ST_COLOR8 "#1c61c2"
+# define ST_COLOR9 "#ff0000"
+# define ST_COLOR10 "#d300c4"
+# define ST_COLOR11 "#f57800"
+# define ST_COLOR12 "#00ff00"
+# define ST_COLOR13 "#711c91"
+# define ST_COLOR14 "#0abdc6"
+# define ST_COLOR15 "#d7d7d5"
diff --git a/themes/catppuccin.h b/themes/catppuccin.h
new file mode 100644
index 0000000..6642319
--- /dev/null
+++ b/themes/catppuccin.h
@@ -0,0 +1,18 @@
+# define ST_FOREGROUND "#D9E0EE"
+# define ST_BACKGROUND "#1E1E2E"
+# define ST_COLOR0 "#6E6C7E"
+# define ST_COLOR1 "#F28FAD"
+# define ST_COLOR2 "#ABE9B3"
+# define ST_COLOR3 "#FAE3B0"
+# define ST_COLOR4 "#96CDFB"
+# define ST_COLOR5 "#DDB6F2"
+# define ST_COLOR6 "#F5C2E7"
+# define ST_COLOR7 "#C3BAC6"
+# define ST_COLOR8 "#988BA2"
+# define ST_COLOR9 "#F28FAD"
+# define ST_COLOR10 "#ABE9B3"
+# define ST_COLOR11 "#FAE3B0"
+# define ST_COLOR12 "#96CDFB"
+# define ST_COLOR13 "#DDB6F2"
+# define ST_COLOR14 "#F5C2E7"
+# define ST_COLOR15 "#D9E0EE"
diff --git a/themes/dracula.h b/themes/dracula.h
new file mode 100644
index 0000000..1961616
--- /dev/null
+++ b/themes/dracula.h
@@ -0,0 +1,18 @@
+# define ST_FOREGROUND "#F8F8F2"
+# define ST_BACKGROUND "#282A36"
+# define ST_COLOR0 "#000000"
+# define ST_COLOR1 "#FF5555"
+# define ST_COLOR2 "#50FA7B"
+# define ST_COLOR3 "#F1FA8C"
+# define ST_COLOR4 "#BD93F9"
+# define ST_COLOR5 "#FF79C6"
+# define ST_COLOR6 "#8BE9FD"
+# define ST_COLOR7 "#BFBFBF"
+# define ST_COLOR8 "#4D4D4D"
+# define ST_COLOR9 "#FF6E67"
+# define ST_COLOR10 "#5AF78E"
+# define ST_COLOR11 "#F4F99D"
+# define ST_COLOR12 "#CAA9FA"
+# define ST_COLOR13 "#FF92D0"
+# define ST_COLOR14 "#9AEDFE"
+# define ST_COLOR15 "#E6E6E6"
diff --git a/themes/dwan.h b/themes/dwan.h
new file mode 100644
index 0000000..6446c11
--- /dev/null
+++ b/themes/dwan.h
@@ -0,0 +1,19 @@
+# define ST_FOREGROUND "#9b9081"
+# define ST_BACKGROUND "#181b20"
+# define ST_CURSORCOLOR "#9b9081"
+# define ST_COLOR0 "#353535"
+# define ST_COLOR1 "#744b40"
+# define ST_COLOR2 "#6d6137"
+# define ST_COLOR3 "#765636"
+# define ST_COLOR4 "#61564b"
+# define ST_COLOR5 "#6b4a49"
+# define ST_COLOR6 "#435861"
+# define ST_COLOR7 "#b3b3b3"
+# define ST_COLOR8 "#5f5f5f"
+# define ST_COLOR9 "#785850"
+# define ST_COLOR10 "#6f6749"
+# define ST_COLOR11 "#776049"
+# define ST_COLOR12 "#696057"
+# define ST_COLOR13 "#6f5a59"
+# define ST_COLOR14 "#525f66"
+# define ST_COLOR15 "#cdcdcd"
diff --git a/themes/gruvbox-dark.h b/themes/gruvbox-dark.h
new file mode 100644
index 0000000..c7901e8
--- /dev/null
+++ b/themes/gruvbox-dark.h
@@ -0,0 +1,18 @@
+# define ST_FOREGROUND "#ebdbb2"
+# define ST_BACKGROUND "#282828"
+# define ST_COLOR0 "#282828"
+# define ST_COLOR1 "#cc241d"
+# define ST_COLOR2 "#98971a"
+# define ST_COLOR3 "#d79921"
+# define ST_COLOR4 "#458588"
+# define ST_COLOR5 "#b16286"
+# define ST_COLOR6 "#689d6a"
+# define ST_COLOR7 "#a89984"
+# define ST_COLOR8 "#928374"
+# define ST_COLOR9 "#fb4934"
+# define ST_COLOR10 "#b8bb26"
+# define ST_COLOR11 "#fabd2f"
+# define ST_COLOR12 "#83a598"
+# define ST_COLOR13 "#d3869b"
+# define ST_COLOR14 "#8ec07c"
+# define ST_COLOR15 "#ebdbb2"
diff --git a/themes/leet.h b/themes/leet.h
new file mode 100644
index 0000000..e149a2d
--- /dev/null
+++ b/themes/leet.h
@@ -0,0 +1,21 @@
+# define ST_ALPHA .75F
+# define ST_FOREGROUND "#FF0000"
+# define ST_BACKGROUND "#080000"
+# define ST_CURSORCOLOR "#D40000"
+# define ST_REVCURCOLOR "#FF0000"
+# define ST_COLOR0 "#010008"
+# define ST_COLOR1 "#A71B1A"
+# define ST_COLOR2 "#3B8526"
+# define ST_COLOR3 "#E49202"
+# define ST_COLOR4 "#1D576D"
+# define ST_COLOR5 "#97219C"
+# define ST_COLOR6 "#24866F"
+# define ST_COLOR7 "#B5AD64"
+# define ST_COLOR8 "#1C1C1C"
+# define ST_COLOR9 "#BF3130"
+# define ST_COLOR10 "#58A642"
+# define ST_COLOR11 "#FFB026"
+# define ST_COLOR12 "#4169E1"
+# define ST_COLOR13 "#A7248C"
+# define ST_COLOR14 "#37A48D"
+# define ST_COLOR15 "#CEC67D"
diff --git a/themes/redish.h b/themes/redish.h
new file mode 100644
index 0000000..51fedfc
--- /dev/null
+++ b/themes/redish.h
@@ -0,0 +1,20 @@
+# define ST_FOREGROUND "#FF0000"
+# define ST_BACKGROUND "#1C0F0F"
+# define ST_CURSORCOLOR "#D40000"
+# define ST_REVCURCOLOR "#FF0000"
+# define ST_COLOR0 "#1C0F11"
+# define ST_COLOR1 "#752323"
+# define ST_COLOR2 "#D96767"
+# define ST_COLOR3 "#FF0000"
+# define ST_COLOR4 "#523F3F"
+# define ST_COLOR5 "#993131"
+# define ST_COLOR6 "#B45050"
+# define ST_COLOR7 "#735050"
+# define ST_COLOR8 "#806060"
+# define ST_COLOR9 "#C02F2F"
+# define ST_COLOR10 "#D76262"
+# define ST_COLOR11 "#FF0000"
+# define ST_COLOR12 "#7E4F4F"
+# define ST_COLOR13 "#FF1111"
+# define ST_COLOR14 "#FF8A8A"
+# define ST_COLOR15 "#8C6161"
diff --git a/themes/solarized-dark.h b/themes/solarized-dark.h
new file mode 100644
index 0000000..4dabf4b
--- /dev/null
+++ b/themes/solarized-dark.h
@@ -0,0 +1,19 @@
+# define ST_FOREGROUND "#839496"
+# define ST_BACKGROUND "#002b36"
+# define ST_CURSORCOLOR "#93a1a1"
+# define ST_COLOR0 "#073642"
+# define ST_COLOR1 "#dc322f"
+# define ST_COLOR2 "#859900"
+# define ST_COLOR3 "#b58900"
+# define ST_COLOR4 "#268bd2"
+# define ST_COLOR5 "#d33682"
+# define ST_COLOR6 "#2aa198"
+# define ST_COLOR7 "#eee8d5"
+# define ST_COLOR8 "#002b36"
+# define ST_COLOR9 "#cb4b16"
+# define ST_COLOR10 "#586e75"
+# define ST_COLOR11 "#657b83"
+# define ST_COLOR12 "#839496"
+# define ST_COLOR13 "#6c71c4"
+# define ST_COLOR14 "#93a1a1"
+# define ST_COLOR15 "#fdf6e3"
diff --git a/themes/st-defaults.h b/themes/st-defaults.h
new file mode 100644
index 0000000..d9c6cfa
--- /dev/null
+++ b/themes/st-defaults.h
@@ -0,0 +1,22 @@
+# define ST_FONT "Liberation Mono:pixelsize=12:antialias=true:autohint=true"
+# define ST_ALPHA 1
+# define ST_FOREGROUND "gray90"
+# define ST_BACKGROUND "black"
+# define ST_CURSORCOLOR "#cccccc"
+# define ST_REVCURCOLOR "#555555"
+# define ST_COLOR0 "black"
+# define ST_COLOR1 "red3"
+# define ST_COLOR2 "green3"
+# define ST_COLOR3 "yellow3"
+# define ST_COLOR4 "blue2"
+# define ST_COLOR5 "magenta3"
+# define ST_COLOR6 "cyan3"
+# define ST_COLOR7 "gray90"
+# define ST_COLOR8 "gray50"
+# define ST_COLOR9 "red"
+# define ST_COLOR10 "green"
+# define ST_COLOR11 "yellow"
+# define ST_COLOR12 "#5c5cff"
+# define ST_COLOR13 "magenta"
+# define ST_COLOR14 "cyan"
+# define ST_COLOR15 "white"
diff --git a/themes/sweetlove.h b/themes/sweetlove.h
new file mode 100644
index 0000000..5c85bd0
--- /dev/null
+++ b/themes/sweetlove.h
@@ -0,0 +1,19 @@
+# define ST_FOREGROUND "#c0b18b"
+# define ST_BACKGROUND "#1f1f1f"
+# define ST_CURSORCOLOR "#c0b18b"
+# define ST_COLOR0 "#4a3637"
+# define ST_COLOR1 "#d17b49"
+# define ST_COLOR2 "#7b8748"
+# define ST_COLOR3 "#af865a"
+# define ST_COLOR4 "#535c5c"
+# define ST_COLOR5 "#775759"
+# define ST_COLOR6 "#6d715e"
+# define ST_COLOR7 "#c0b18b"
+# define ST_COLOR8 "#402e2e"
+# define ST_COLOR9 "#ac5d2f"
+# define ST_COLOR10 "#647035"
+# define ST_COLOR11 "#8f6840"
+# define ST_COLOR12 "#444b4b"
+# define ST_COLOR13 "#614445"
+# define ST_COLOR14 "#585c49"
+# define ST_COLOR15 "#978965"
diff --git a/themesetup b/themesetup
new file mode 100755
index 0000000..e8710c1
--- /dev/null
+++ b/themesetup
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+echo \# if $(cat theme.h | cut -d' ' -f3 | sed "s/^/defined /;s/$/ ||/" | tr "\n" " ") 0 > theme_beg.h
+echo -e "# error (conflicting macro names)\n# endif" >> theme_beg.h
+cat theme.h | cut -d' ' -f3 | sed "s/^/# undef /;" > theme_end.h
diff --git a/xresources.list b/xresources.list
new file mode 100644
index 0000000..5eaf27c
--- /dev/null
+++ b/xresources.list
@@ -0,0 +1,22 @@
+F	alpha
+S	font
+S	foreground
+S	background
+S	cursorColor
+S	revCurColor
+S	color0
+S	color1
+S	color2
+S	color3
+S	color4
+S	color5
+S	color6
+S	color7
+S	color8
+S	color9
+S	color10
+S	color11
+S	color12
+S	color13
+S	color14
+S	color15
diff --git a/xtheme b/xtheme
new file mode 100755
index 0000000..c1412a3
--- /dev/null
+++ b/xtheme
@@ -0,0 +1,48 @@
+#!/bin/sh
+
+prefix=st
+resfile=xresources.list
+themeout=theme.h
+themedefaults=themes/st-defaults.h
+
+rm -f $themeout
+
+cat "$resfile" | while read T R A
+do
+	m=$(echo "$prefix"'_'"$R" | tr '[:lower:]' '[:upper:]')
+
+	s=''
+	[[ "$T" == "S" ]] && s=\"
+
+	l=''
+
+	for r in "$R" "$A"
+	do
+		[[ "$r" == '' ]] && continue
+
+		e=0
+
+		for p in "$prefix" ''
+		do
+			l="$(																\
+				xrdb -query														\
+					| grep -P "^$p\*?\.?$r:\s*\S*$" -m 1						\
+					| sed "s/^$p\*\?\.\?$r:\s*\(\S*\)$/# define $m $s\1$s/"		\
+			)"
+
+			if [[ "$l" != '' ]]
+			then
+				e=1
+				echo "$l" >> $themeout
+				break
+			fi
+		done
+
+		[[ $e == 1 ]] && break
+	done
+
+	if [[ "$l" == '' ]]
+	then
+		cat "$themedefaults" | grep -P "^# define $m " -m 1 >> $themeout
+	fi
+done