Fixes for NIRVSS UI spectral plot view

- Fixes Y axis 2 vertical line color in spectral plot;
- Tweaks to themed plot hash line colors;

src/styles/_constants-espresso.scss

@@ -351,7 +351,7 @@ $colorSummaryFgEm: $colorBodyFg;
 // Plot
 $colorPlotBg: rgba(black, 0.1);
 $colorPlotFg: $colorBodyFg;
-$colorPlotHash: black;
+$colorPlotHash: $colorPlotFg;
 $opacityPlotHash: 0.2;
 $stylePlotHash: dashed;
 $colorPlotAreaBorder: $colorInteriorBorder;

src/styles/_constants-snow.scss

@@ -351,8 +351,8 @@ $colorSummaryFgEm: white;
 // Plot
 $colorPlotBg: rgba(black, 0.05);
 $colorPlotFg: $colorBodyFg;
-$colorPlotHash: black;
-$opacityPlotHash: 0.2;
+$colorPlotHash: $colorPlotFg;
+$opacityPlotHash: 0.3;
 $stylePlotHash: dashed;
 $colorPlotAreaBorder: $colorInteriorBorder;
 $colorPlotLabelFg: pushBack($colorPlotFg, 20%);

src/styles/plotly.scss

@@ -41,7 +41,8 @@
         }
 
         path.xy2-y {
-            stroke: $colorPlotHash !important;
+            stroke: $colorPlotHash !important; // Using this instead of $colorPlotAreaBorder because that is an rgba
+            opacity: $opacityPlotHash !important;
         }
     }