diff --git a/install.sh b/install.sh
index 9c05de15..b3ec5c4a 100755
--- a/install.sh
+++ b/install.sh
@@ -41,6 +41,7 @@ usage() {
   helpify "--round, --roundedmaxwindow"   ""                                          "Set maximized window to rounded"                  "Default is square"
   helpify "--right, --rightplacement"     ""                                          "Set Nautilus titlebutton placement to right"      "Default is left"
   helpify "--black, --blackfont"          ""                                          "Set panel font color to black"                    "Default is white"
+  helpify "--darker, --darkercolor"       ""                                          "Install darker '${THEME_NAME}' dark themes"       ""
   helpify "--dialog, --interactive"       ""                                          "Run this installer interactively, with dialogs"   ""
   helpify "--silent-mode"                 ""                                          "Meant for developers: ignore any confirm prompt and params become more strict" ""
   helpify "-r, --remove, -u, --uninstall" ""                                          "Remove all installed ${THEME_NAME} themes"        ""
@@ -66,7 +67,7 @@ while [[ $# -gt 0 ]]; do
   # at once
 
   case "${1}" in
-      # Parameters that don't require value
+    # Parameters that don't require value
     -r|--remove|-u|-uninstall)
       uninstall='true'; shift ;;
     --silent-mode)
@@ -81,11 +82,13 @@ while [[ $# -gt 0 ]]; do
       max_round="true"; shift ;;
     --black|--blackfont)
       black_font="true"; shift ;;
+    --darker|--darkercolor)
+      darker="true"; shift ;;
     -HD|--highdefinition)
       compact="false"; shift ;;
     -m|--monterey)
       monterey="true"; shift ;;
-      # Parameters that require value, single use
+    # Parameters that require value, single use
     -b|--background)
       check_param "${1}" "${1}" "${2}" "must" "must" "must" "false" && shift 2 || shift ;;
     -d|--dest)
@@ -140,7 +143,7 @@ else
     show_needed_dialogs
   fi
 
-  prompt -w "Removing the old '${name}' themes..."
+  prompt -w "Removing the old '${name}' themes... \n"
 
   remove_themes; customize_theme; avoid_variant_duplicates; echo
 
diff --git a/lib-install.sh b/lib-install.sh
index 9ccf8bd1..b0a8f320 100755
--- a/lib-install.sh
+++ b/lib-install.sh
@@ -813,22 +813,10 @@ gtk_base() {
 customize_theme() {
   cp -rf "${THEME_SRC_DIR}/sass/_theme-options"{".scss","-temp.scss"}
 
-  # Change gnome-shell panel transparency
-  if [[ "${panel_opacity}" != 'default' ]]; then
-    prompt -s "Changing panel transparency ... \n"
-    sed $SED_OPT "/\$panel_opacity/s/0.15/0.${panel_opacity}/"                  "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
-  fi
-
-  # Change gnome-shell panel height size
-  if [[ "${panel_size}" != 'default' ]]; then
-    prompt -s "Changing panel height size to '${panel_size}'... \n"
-    sed $SED_OPT "/\$panel_size/s/default/${panel_size}/"                       "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
-  fi
-
-  # Change gnome-shell show apps button style
-  if [[ "${showapps_normal}" == 'true' ]]; then
-    prompt -s "Changing gnome-shell show apps button style ... \n"
-    sed $SED_OPT "/\$showapps_button/s/bigsur/normal/"                          "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
+  # Darker dark colors
+  if [[ "${darker}" == 'true' ]]; then
+    prompt -s "Changing dark color style to darker one ..."
+    sed $SED_OPT "/\$darker/s/false/true/"                                      "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
   fi
 
   # Change Nautilus sidarbar size
@@ -839,43 +827,61 @@ customize_theme() {
 
   # Change Nautilus style
   if [[ "${nautilus_style}" != 'stable' ]]; then
-    prompt -s "Changing Nautilus style ... \n"
+    prompt -s "Changing Nautilus style ..."
     sed $SED_OPT "/\$nautilus_style/s/stable/${nautilus_style}/"                "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
   fi
 
   # Change Nautilus titlebutton placement style
   if [[ "${right_placement}" == 'true' ]]; then
-    prompt -s "Changing Nautilus titlebutton placement style ... \n"
+    prompt -s "Changing Nautilus titlebutton placement style ..."
     sed $SED_OPT "/\$placement/s/left/right/"                                   "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
   fi
 
   # Change maximized window radius
   if [[ "${max_round}" == 'true' ]]; then
-    prompt -s "Changing maximized window style ... \n"
+    prompt -s "Changing maximized window style ..."
     sed $SED_OPT "/\$max_window_style/s/square/round/"                          "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
   fi
 
+  # Change gnome-shell panel transparency
+  if [[ "${panel_opacity}" != 'default' ]]; then
+    prompt -s "Changing panel transparency ..."
+    sed $SED_OPT "/\$panel_opacity/s/0.15/0.${panel_opacity}/"                  "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
+  fi
+
+  # Change gnome-shell panel height size
+  if [[ "${panel_size}" != 'default' ]]; then
+    prompt -s "Changing panel height size to '${panel_size}'..."
+    sed $SED_OPT "/\$panel_size/s/default/${panel_size}/"                       "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
+  fi
+
+  # Change gnome-shell show apps button style
+  if [[ "${showapps_normal}" == 'true' ]]; then
+    prompt -s "Changing gnome-shell show apps button style ..."
+    sed $SED_OPT "/\$showapps_button/s/bigsur/normal/"                          "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
+  fi
+
   # Change panel font color
   if [[ "${monterey}" == 'true' ]]; then
     black_font="true"
-    prompt -s "Changing to Monterey style ... \n"
+    prompt -s "Changing to Monterey style ..."
     sed $SED_OPT "/\$monterey/s/false/true/"                                    "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
     sed $SED_OPT "/\$panel_opacity/s/0.15/0.5/"                                 "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
   fi
 
   # Change panel font color
   if [[ "${black_font}" == 'true' ]]; then
-    prompt -s "Changing panel font color ... \n"
+    prompt -s "Changing panel font color ..."
     sed $SED_OPT "/\$panel_font/s/white/black/"                                 "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
   fi
 
   if [[ "${compact}" == 'false' ]]; then
-    prompt -s "Changing Definition mode to HD (Bigger font, Bigger size) ... \n"
+    prompt -s "Changing Definition mode to HD (Bigger font, Bigger size) ..."
     #FIXME: @vince is it not implemented yet? (Only Gnome-shell and Gtk theme finished!)
   fi
 
   if [[ "${scale}" == 'x2' ]]; then
-    prompt -s "Changing GDM scaling to 200% ... \n"
+    prompt -s "Changing GDM scaling to 200% ..."
     sed $SED_OPT "/\$scale/s/default/x2/"                                       "${THEME_SRC_DIR}/sass/_theme-options-temp.scss"
   fi
 }
diff --git a/src/sass/_colors.scss b/src/sass/_colors.scss
index 33a18e21..50dfb39d 100644
--- a/src/sass/_colors.scss
+++ b/src/sass/_colors.scss
@@ -10,9 +10,9 @@
 @import 'colors-palette';
 
 // Base colors
-$base_color:                        if($variant == 'light', #ffffff, #242424);
+$base_color:                        if($variant == 'light', #ffffff, if($darker == 'true', #1f1f1f, #242424));
 $text_color:                        if($variant == 'light', #363636, #dadada);
-$bg_color:                          if($variant == 'light', #f5f5f5, #333333);
+$bg_color:                          if($variant == 'light', #f5f5f5, if($darker == 'true', #282828, #333333));
 $fg_color:                          if($variant == 'light', #242424, #dedede);
 $alt_fg_color:                      if($variant == 'light', #424242, #afafaf);
 $hint_fg_color:                     if($variant == 'light', #565656, #999999);
@@ -102,9 +102,9 @@ $alt_disabled_fg_color:             if($variant == 'light', transparentize($alt_
 $disabled_bg_color:                 if($variant == 'light', mix($bg_color, $base_color, 40%), lighten($bg_color, 2%));
 
 // Headerbar colors
-$header_bg:                         if($variant == 'light', #ffffff, #373737);
+$header_bg:                         if($variant == 'light', #ffffff, if($darker == 'true', #1e1e1e, #373737));
 $dark_header_bg:                    if($trans == 'true', rgba($base_color, 0.95), $base_color);
-$header_highlight:                  if($variant == 'dark', #434343, #f5f5f5); // For metacity
+$header_highlight:                  if($variant == 'dark', if($darker == 'true', #242424, #434343), #f5f5f5); // For metacity
 
 $header_bg_backdrop:                if($variant == 'light', darken($header_bg, 0%), darken($header_bg, 0%));
 $header_border:                     if($variant == 'light', mix(black, $header_bg, 12%), mix(black, $header_bg, 75%));
@@ -123,11 +123,11 @@ $dark_sidebar_bg: white;
 }
 
 @if $trans=='true' and $variant=='dark' {
-  $dark_sidebar_bg:                 transparentize(#333333, 0.05);
+  $dark_sidebar_bg:                 transparentize(if($darker == 'true', #282828, #333333), 0.05);
 }
 
 @if $trans=='false' and $variant=='dark' {
-  $dark_sidebar_bg:                 #333333;
+  $dark_sidebar_bg:                 if($darker == 'true', #282828, #333333);
 }
 
 $dark_sidebar_fg:                   $text_color;
@@ -136,7 +136,7 @@ $sidebar_theme_color:               if($variant == 'light', rgba(black, 0.12), r
 
 //OSD colors
 $osd_fg_color:                      #dadada;
-$osd_bg_color:                      if($trans=='true', rgba(#2a2a2a, 0.9), #2a2a2a);
+$osd_bg_color:                      if($trans=='true', rgba(if($darker == 'true', #1a1a1a, #2a2a2a), 0.9), if($darker == 'true', #1a1a1a, #2a2a2a));
 $osd_button_bg:                     rgba(lighten($osd_bg_color, 22%), 0.96);
 $osd_button_border:                 $dark_borders_color;
 $osd_entry_bg:                      rgba(lighten($osd_bg_color, 22%), 0.96);
@@ -158,7 +158,7 @@ $submenu_bg_color:                  if($variant == 'light', rgba(white, 1), rgba
 @if $trans=='true' { $submenu_bg_color: if($variant == 'light', rgba(white, 0.75), rgba(white, 0.15)); }
 
 // Panel colors
-$panel_bg:                          if($variant == 'light', #f1f1f1, #2a2a2a);
+$panel_bg:                          if($variant == 'light', #f1f1f1, if($darker == 'true', #1f1f1f, #2a2a2a));
 
 @if $trans == 'true' {
   $panel_bg:                        if($variant == 'light', rgba(white, $panel_opacity/2 + 0.08), rgba(black, $panel_opacity));
@@ -172,10 +172,10 @@ $panel_fg:                          if($trans == 'true' and $panel_font == 'whit
 $panel_track:                       if(($trans == 'false' or $panel_font == 'black') and $variant == 'light', rgba(black, 0.15), rgba(white, 0.28));
 $panel_divider:                     if(($trans == 'false' or $panel_font == 'black') and $variant == 'light', rgba(black, 0.08), rgba(white, 0.15));
 
-$dash_bg:                           if($variant == 'light', rgba(#d1d1d1, $panel_opacity + 0.33), rgba(#222222, $panel_opacity/2 + 0.6));
+$dash_bg:                           if($variant == 'light', rgba(#d1d1d1, $panel_opacity + 0.33), rgba(if($darker == 'true', #1f1f1f, #222222), $panel_opacity/2 + 0.6));
 
 @if $trans == 'true' and $panel_font == 'black' {
-  $dash_bg:                         if($variant == 'light', rgba(#d1d1d1, $panel_opacity/2 + 0.08), rgba(#222222, $panel_opacity + 0.15));
+  $dash_bg:                         if($variant == 'light', rgba(#d1d1d1, $panel_opacity/2 + 0.08), rgba(if($darker == 'true', #1f1f1f, #222222), $panel_opacity + 0.15));
 }
 
 $dash_fg: if($variant == 'light', black, white);
diff --git a/src/sass/_theme-options.scss b/src/sass/_theme-options.scss
index b034949d..b9d75bef 100644
--- a/src/sass/_theme-options.scss
+++ b/src/sass/_theme-options.scss
@@ -29,5 +29,8 @@ $panel_size: 'default';
 // Monterey style
 $monterey: 'false';
 
+// Color style
+$darker: 'false';
+
 // GDM login dialog scale
 $scale: 'default';
diff --git a/tweaks.sh b/tweaks.sh
index 77e5a93a..61e88c5b 100755
--- a/tweaks.sh
+++ b/tweaks.sh
@@ -28,7 +28,7 @@ usage() {
   helpify "-F, --flatpak"       ""                                                  "Connect '${THEME_NAME}' theme to Flatpak"                                    ""
   helpify "-s, --snap"          ""                                                  "Connect '${THEME_NAME}' theme the currently installed snap apps"             ""
   helpify "-g, --gdm"           "[default|x2]"                                      "Install '${THEME_NAME}' theme for GDM (scaling: 100%/200%, default is 100%)" "Requires to run this shell as root"
-  helpify "-d, --dash-to-dock"  ""                                                  "Fixed Dash to Dock theme issue" ""
+  helpify "-d, --dash-to-dock"  ""                                                  "Fixed Dash to Dock theme issue"                                              ""
   helpify "-N, --no-darken"     ""                                                  "Don't darken '${THEME_NAME}' GDM theme background image"                     ""
   helpify "-n, --no-blur"       ""                                                  "Don't blur '${THEME_NAME}' GDM theme background image"                       ""
   helpify "-b, --background"    "[default|blank|IMAGE_PATH]"                        "Set '${THEME_NAME}' GDM theme background image"                              "Default is BigSur-like wallpaper"