diff -up dwm-6.6-orig/config.def.h dwm-6.6-flycolors/config.def.h
--- dwm-6.6-orig/config.def.h	2025-12-18 12:11:49.852471883 +0300
+++ dwm-6.6-flycolors/config.def.h	2025-12-21 13:53:01.026979278 +0300
@@ -11,11 +11,23 @@ static const char col_gray1[]       = "#
 static const char col_gray2[]       = "#444444";
 static const char col_gray3[]       = "#bbbbbb";
 static const char col_gray4[]       = "#eeeeee";
-static const char col_cyan[]        = "#005577";
-static const char *colors[][3]      = {
+static const char default_flycolor[] = "#666666";
+
+static const char *flycolors[] = {
+	"#666666", // gray
+	"#005577", // blue
+	"#117755", // green
+	"#aa7711", // yellow
+	"#771111", // red
+	"#551177", // magenta
+	"#aa1177", // pink
+	NULL // used to count the array size
+};
+
+static const char *colors[][3] = {
 	/*               fg         bg         border   */
 	[SchemeNorm] = { col_gray3, col_gray1, col_gray2 },
-	[SchemeSel]  = { col_gray4, col_cyan,  col_cyan  },
+	[SchemeSel]  = { col_gray4, default_flycolor, default_flycolor }, /* [1] and [2] are changed in cycle_flycolors */
 };
 
 /* tagging */
@@ -57,13 +69,24 @@ static const Layout layouts[] = {
 
 /* commands */
 static char dmenumon[2] = "0"; /* component of dmenucmd, manipulated in spawn() */
-static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
+static const char *dmenucmd[] = {
+	"dmenu_run",
+	"-m", dmenumon,
+	"-fn", dmenufont,
+	"-nb", col_gray1,
+	"-nf", col_gray3,
+	"-sb", default_flycolor, /* changed as dmenucmd[10] in cycle_flycolors */
+	"-sf", col_gray4,
+	NULL
+};
 static const char *termcmd[]  = { "st", NULL };
 
 static const Key keys[] = {
 	/* modifier                     key        function        argument */
 	{ MODKEY,                       XK_p,      spawn,          {.v = dmenucmd } },
 	{ MODKEY|ShiftMask,             XK_Return, spawn,          {.v = termcmd } },
+	{ MODKEY,                       XK_c,      cycle_flycolors, { .i = +1 } },
+	{ MODKEY|ShiftMask,             XK_c,      cycle_flycolors, { .i = -1 } },
 	{ MODKEY,                       XK_b,      togglebar,      {0} },
 	{ MODKEY,                       XK_j,      focusstack,     {.i = +1 } },
 	{ MODKEY,                       XK_k,      focusstack,     {.i = -1 } },
@@ -73,7 +96,7 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_l,      setmfact,       {.f = +0.05} },
 	{ MODKEY,                       XK_Return, zoom,           {0} },
 	{ MODKEY,                       XK_Tab,    view,           {0} },
-	{ MODKEY|ShiftMask,             XK_c,      killclient,     {0} },
+	{ MODKEY|ShiftMask,             XK_x,      killclient,     {0} },
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
diff -up dwm-6.6-orig/dwm.1 dwm-6.6-flycolors/dwm.1
--- dwm-6.6-orig/dwm.1	2025-12-18 12:11:49.852471883 +0300
+++ dwm-6.6-flycolors/dwm.1	2025-12-21 13:53:01.026979278 +0300
@@ -113,9 +113,15 @@ Decrease master area size.
 .B Mod1\-Return
 Zooms/cycles focused window to/from master area (tiled layouts only).
 .TP
-.B Mod1\-Shift\-c
+.B Mod1\-Shift\-x
 Close focused window.
 .TP
+.B Mod1\-c
+Cycle flycolors.
+.TP
+.B Mod1\-Shift\-c
+Cycle flycolors back.
+.TP
 .B Mod1\-Shift\-space
 Toggle focused window between tiled and floating state.
 .TP
diff -up dwm-6.6-orig/dwm.c dwm-6.6-flycolors/dwm.c
--- dwm-6.6-orig/dwm.c	2025-12-18 12:11:49.852471883 +0300
+++ dwm-6.6-flycolors/dwm.c	2025-12-21 16:55:38.250530788 +0300
@@ -141,6 +141,8 @@ typedef struct {
 } Rule;
 
 /* function declarations */
+static void cycle_flycolors(const Arg *arg);
+static void update_scheme();
 static void applyrules(Client *c);
 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 static void arrange(Monitor *m);
@@ -234,6 +236,7 @@ static int xerrorstart(Display *dpy, XEr
 static void zoom(const Arg *arg);
 
 /* variables */
+static unsigned int iflycol = 0;
 static const char broken[] = "broken";
 static char stext[256];
 static int screen;
@@ -2139,6 +2142,30 @@ zoom(const Arg *arg)
 	pop(c);
 }
 
+void
+update_scheme()
+{
+	Client *c = selmon->sel;
+	for (int i = 0; i < LENGTH(colors); i++)
+		scheme[i] = drw_scm_create(drw, colors[i], 3);
+	focus(c);
+}
+
+void
+cycle_flycolors(const Arg *arg)
+{
+	int flycolors_limit = 256;
+	int i;
+	for(i = 0; flycolors[i] != NULL && i < flycolors_limit; i++)
+		;
+	iflycol += i + arg->i;
+	iflycol %= i;
+	colors[SchemeSel][1] = flycolors[iflycol];
+	colors[SchemeSel][2] = flycolors[iflycol];
+	update_scheme();
+	dmenucmd[10] = flycolors[iflycol];
+}
+
 int
 main(int argc, char *argv[])
 {