diff -r e87d9104e8fc data.c
--- a/data.c	Mon Feb 19 08:15:49 2018 +0000
+++ b/data.c	Sun Dec 09 16:21:22 2018 -0600
@@ -7,6 +7,7 @@
 #include <keyboard.h>
 #include <frame.h>
 #include <fcall.h>
+#include <theme.h>
 #include "dat.h"
 #include "fns.h"
 
@@ -189,22 +190,23 @@
 {
 	int fd;
 	Image *bimg = nil;
+	themeinit("rio");
 
-	background = allocimage(display, Rect(0,0,1,1), RGB24, 1, bgtrans);
+	background = allocimage(display, Rect(0,0,1,1), RGB24, 1, themeget("background", bgtrans));
 
 	/* greys are multiples of 0x11111100+0xFF, 14* being palest */
-	cols[BACK] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, winbgcolor^reverse);
-	cols[BORD] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, scrollbarcolor^reverse);
-	cols[TEXT] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, textcolor^reverse);
-	cols[HTEXT] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, 0x000000FF);
+	cols[BACK] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("termback", winbgcolor^reverse));
+	cols[BORD] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("termbord", scrollbarcolor^reverse));
+	cols[TEXT] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("termtext", textcolor^reverse));
+	cols[HTEXT] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("termhtext", 0x000000FF));
 	if(!reverse) {
-		cols[HIGH] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, 0xCCCCCCFF);
-		titlecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, borderactivecolor);
-		lighttitlecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, borderbgcolor);
+		cols[HIGH] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("termhigh", 0xCCCCCCFF));
+		titlecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("title", borderactivecolor));
+		lighttitlecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("lighttitle", borderbgcolor));
 	} else {
-		cols[HIGH] = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DPurpleblue);
-		titlecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, borderactivecolor);
-		lighttitlecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, borderbgcolor);
+		cols[HIGH] = allocimage(display, Rect(0,0,1,1), CMAP8, 1,themeget("termhigh", DPurpleblue));
+		titlecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("title", borderactivecolor));
+		lighttitlecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("lighttitle", borderbgcolor));
 	}
 	if(bf != nil){
 		fd = open(bf, OREAD);
@@ -218,14 +220,16 @@
 		background = allocimage(display, Rect(0, 0, Dx(bimg->r), Dy(bimg->r)), RGB24, 1, 0xFFFFFFFF);
 		draw(background, background->r, bimg, 0, bimg->r.min);
 	}
-	dholdcol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DMedblue);
-	lightholdcol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DGreyblue);
-	paleholdcol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DPalegreyblue);
-	paletextcol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, 0x666666FF^reverse);
-	sizecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, DRed);
+	dholdcol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("hold", DMedblue));
+	lightholdcol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("lighthold", DGreyblue));
+	paleholdcol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("palehold", DPalegreyblue));
+	paletextcol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("paletext", 0x666666FF^reverse));
+	sizecol = allocimage(display, Rect(0,0,1,1), CMAP8, 1, themeget("size", DRed));
 
 	if(reverse == 0)
 		holdcol = dholdcol;
 	else
 		holdcol = paleholdcol;
+
+	themeend();
 }
diff -r e87d9104e8fc mkfile
--- a/mkfile	Mon Feb 19 08:15:49 2018 +0000
+++ b/mkfile	Sun Dec 09 16:21:22 2018 -0600
@@ -24,7 +24,8 @@
 </sys/src/cmd/mkone
 
 $O.out:	/$objtype/lib/libdraw.a /$objtype/lib/libframe.a \
-	/$objtype/lib/libthread.a /$objtype/lib/libplumb.a /$objtype/lib/libc.a
+	/$objtype/lib/libthread.a /$objtype/lib/libplumb.a \
+	/$objtype/lib/libtheme.a /$objtype/lib/libc.a
 syms:V:
 	$CC -a $CFLAGS rio.c	> syms
 	$CC -aa $CFLAGS *.c 	>>syms
diff -r e87d9104e8fc rio.c
--- a/rio.c	Mon Feb 19 08:15:49 2018 +0000
+++ b/rio.c	Sun Dec 09 16:21:22 2018 -0600
@@ -29,7 +29,7 @@
 Image*	sweep(void);
 Image*	bandsize(Window*);
 Image*	drag(Window*);
-void		resized(void);
+void		resized(int new);
 Channel	*exitchan;	/* chan(int) */
 Channel	*winclosechan; /* chan(Window*); */
 Channel	*kbdchan;	/* chan(char*); */
@@ -602,7 +602,7 @@
 	for(;;)
 	    switch(alt(alts)){
 		case MReshape:
-			resized();
+			resized(1);
 			break;
 		case MMouse:
 			if(wkeyboard!=nil && (mouse->buttons & (1<<5))){
@@ -708,16 +708,17 @@
 }
 
 void
-resized(void)
+resized(int new)
 {
 	Image *im;
 	int i, j;
 	Rectangle r;
 	Point o, n;
 	Window *w;
-
-	if(getwindow(display, Refnone) < 0)
-		error("failed to re-attach window");
+	
+	if(new)
+		if(getwindow(display, Refnone) < 0)
+			error("failed to re-attach window");
 	freescrtemps();
 	view = screen;
 	freescreen(wscreen);
diff -r e87d9104e8fc wctl.c
--- a/wctl.c	Mon Feb 19 08:15:49 2018 +0000
+++ b/wctl.c	Sun Dec 09 16:21:22 2018 -0600
@@ -30,6 +30,7 @@
 	Hide,
 	Unhide,
 	Delete,
+	Background,
 };
 
 static char *cmds[] = {
@@ -45,6 +46,7 @@
 	[Hide]	= "hide",
 	[Unhide]	= "unhide",
 	[Delete]	= "delete",
+	[Background]	= "background",
 	nil
 };
 
@@ -301,7 +303,7 @@
 
 	while(isspace(*s))
 		s++;
-	if(cmd!=New && *s!='\0'){
+	if((cmd!=New && cmd!=Background) && *s!='\0'){
 		strcpy(err, "extraneous text in wctl message");
 		return -1;
 	}
@@ -440,6 +442,20 @@
 	return -1;
 }
 
+static void
+wctlbackground(char *file)
+{
+	char *n;
+	
+	if((n = strchr(file, '\n')) != nil)
+		*n = '\0';
+
+	freeimage(background);
+	iconinit(file);
+	extern void resized(int);
+	resized(0);
+}
+
 int
 writewctl(Xfid *x, char *err)
 {
@@ -473,6 +489,13 @@
 		if(pid > 0)
 			wsetpid(w, pid, 0);
 		return 1;
+	case Background:
+		if(*arg == '\0'){
+			strcpy(err, "invalid argument");
+			return -1;
+		}
+		wctlbackground(arg);
+		return 1;
 	}
 
 	incref(w);
@@ -502,6 +525,12 @@
 		switch(cmd){
 		case New:
 			wctlnew(rect, arg, pid, hideit, scrollit, dir, err);
+			break;
+		case Background:
+			if(*arg == '\0')
+				break;
+			wctlbackground(arg);
+			break;
 		}
 		free(buf);
 	}