diff --git a/config_webrx.py b/config_webrx.py
index eb8641a..02f17b7 100644
--- a/config_webrx.py
+++ b/config_webrx.py
@@ -131,7 +131,12 @@ iq_server_port = 4951 #TCP port for ncat to listen on. It will send I/Q data ove
 
 #access_log = "~/openwebrx_access.log"
 
+waterfall_colors = "[0x000000ff,0x2e6893ff, 0x69a5d0ff, 0x214b69ff, 0x9dc4e0ff,  0xfff775ff, 0xff8a8aff, 0xb20000ff]"
+waterfall_min_level = -115 #in dB
+waterfall_max_level = 0
+
 #Warning! The settings below are very experimental.
 csdr_dynamic_bufsize = False # This allows you to change the buffering mode of csdr.
 csdr_print_bufsizes = False  # This prints the buffer sizes used for csdr processes.
 csdr_through = False # Setting this True will print out how much data is going into the DSP chains.
+
diff --git a/htdocs/index.wrx b/htdocs/index.wrx
index 73e6d25..c0dc4cf 100644
--- a/htdocs/index.wrx
+++ b/htdocs/index.wrx
@@ -30,6 +30,9 @@
 			var audio_buffering_fill_to=%[AUDIO_BUFSIZE];
 			var starting_mod = "%[START_MOD]";
 			var starting_offset_frequency = %[START_OFFSET_FREQ];
+			var waterfall_colors=%[WATERFALL_COLORS];
+			var waterfall_min_level=%[WATERFALL_MIN_LEVEL];
+			var waterfall_max_level=%[WATERFALL_MAX_LEVEL];
 		</script>
 		<script src="sdr.js"></script>
 		<script src="openwebrx.js"></script>
diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index c596744..eaf7bdf 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -1534,30 +1534,17 @@ function open_websocket()
 	ws.onerror = on_ws_error;
 }
 
-//var color_scale=[0xFFFFFFFF, 0x000000FF];
-//var color_scale=[0x000000FF, 0x000000FF, 0x3a0090ff, 0x10c400ff, 0xffef00ff, 0xff5656ff];
-//var color_scale=[0x000000FF, 0x000000FF, 0x534b37ff, 0xcedffaff, 0x8899a9ff,  0xfff775ff, 0xff8a8aff, 0xb20000ff];
-
-//var color_scale=[ 0x000000FF, 0xff5656ff, 0xffffffff];
-
-//2014-04-22
-var color_scale=[0x000000ff,0x2e6893ff, 0x69a5d0ff, 0x214b69ff, 0x9dc4e0ff,  0xfff775ff, 0xff8a8aff, 0xb20000ff]
-//2015-04-10
-//var color_scale=[0x112634ff,0x4991c6ff,0x18364cff,0x9dc4e0ff,0xfff775ff,0xff9f60,0xff4d4dff,0x8d0000ff];
-
 function waterfall_mkcolor(db_value)
 {
-	min_value=-115; //in dB
-	max_value=0;
-	if(db_value<min_value) db_value=min_value;
-	if(db_value>max_value) db_value=max_value;
-	full_scale=max_value-min_value;
-	relative_value=db_value-min_value;
+	if(db_value<waterfall_min_level) db_value=waterfall_min_level;
+	if(db_value>waterfall_max_level) db_value=waterfall_max_level;
+	full_scale=waterfall_max_level-waterfall_min_level;
+	relative_value=db_value-waterfall_min_level;
 	value_percent=relative_value/full_scale;
-	percent_for_one_color=1/(color_scale.length-1);
+	percent_for_one_color=1/(waterfall_colors.length-1);
 	index=Math.floor(value_percent/percent_for_one_color);
 	remain=(value_percent-percent_for_one_color*index)/percent_for_one_color;
-	return color_between(color_scale[index+1],color_scale[index],remain);
+	return color_between(waterfall_colors[index+1],waterfall_colors[index],remain);
 }
 
 function color_between(first, second, percent)
diff --git a/openwebrx.py b/openwebrx.py
index ebf409c..d153ff8 100755
--- a/openwebrx.py
+++ b/openwebrx.py
@@ -577,7 +577,10 @@ class WebRXHandler(BaseHTTPRequestHandler):
 						("%[RX_DEVICE]",cfg.receiver_device),
 						("%[AUDIO_BUFSIZE]",str(cfg.client_audio_buffer_size)),
 						("%[START_OFFSET_FREQ]",str(cfg.start_freq-cfg.center_freq)),
-						("%[START_MOD]",cfg.start_mod)
+						("%[START_MOD]",cfg.start_mod),
+						("%[WATERFALL_COLORS]",cfg.waterfall_colors),
+						("%[WATERFALL_MIN_LEVEL]",str(cfg.waterfall_min_level)),
+						("%[WATERFALL_MAX_LEVEL]",str(cfg.waterfall_max_level))
 					)
 					for rule in replace_dictionary:
 						while data.find(rule[0])!=-1: