Trace colors repaired

nanovna.h

@@ -622,9 +622,9 @@ extern volatile uint8_t redraw_request;
 [LCD_MENU_COLOR       ] = RGB565(230,230,230), \
 [LCD_MENU_TEXT_COLOR  ] = RGB565(  0,  0,  0), \
 [LCD_MENU_ACTIVE_COLOR] = RGB565(210,210,210), \
-[LCD_TRACE_1_COLOR    ] = RGB565(255,255,  0), \
-[LCD_TRACE_2_COLOR    ] = RGB565(  0,255,255), \
-[LCD_TRACE_3_COLOR    ] = RGB565(  0,255,  0), \
+[LCD_TRACE_1_COLOR    ] = RGB565(255,  0,  0), \
+[LCD_TRACE_2_COLOR    ] = RGB565(  0,255,  0), \
+[LCD_TRACE_3_COLOR    ] = RGB565(255,255,  0), \
 [LCD_TRACE_4_COLOR    ] = RGB565(255,  0,255), \
 [LCD_NORMAL_BAT_COLOR ] = RGB565( 31,227,  0), \
 [LCD_LOW_BAT_COLOR    ] = RGB565(255,  0,  0), \

plot.c

@@ -2488,7 +2488,8 @@ disable_waterfall(void)
   graph_bottom = NO_WATERFALL;
   waterfall = W_OFF;
   _grid_y = graph_bottom / NGRIDY;
-  ili9341_fill(OFFSETX, graph_bottom, LCD_WIDTH - OFFSETX, CHART_BOTTOM - graph_bottom, 0);
+  ili9341_set_background(LCD_BG_COLOR);
+  ili9341_fill(OFFSETX, graph_bottom, LCD_WIDTH - OFFSETX, CHART_BOTTOM - graph_bottom);
   request_to_redraw_grid();
 }