Fix scatterplot and histogram fill colors. (#1437)

src/rust/ide/view/graph-editor/src/builtin/visualization/java_script/histogram.js

@@ -15,8 +15,6 @@ const X_AXIS_LABEL_WIDTH = 10
 const Y_AXIS_LABEL_WIDTH = 10
 const ANIMATION_DURATION = 1000
 const LINEAR_SCALE = 'linear'
-const LIGHT_PLOT_COLOR = '#00E890'
-const DARK_PLOT_COLOR = '#E0A63B'
 const DEFAULT_NUMBER_OF_BINS = 50
 const BUTTON_HEIGHT = 25
 
@@ -516,11 +514,10 @@ class Histogram extends Visualization {
 
         this.yAxis.call(yAxis)
 
-        let accentColor = LIGHT_PLOT_COLOR
-
-        if (document.getElementById('root').classList.contains('dark')) {
-            accentColor = DARK_PLOT_COLOR
-        }
+        const fill = d3
+            .scaleSequential()
+            .interpolator(d3.interpolateViridis)
+            .domain([0, d3.max(bins, d => d.x0)])
 
         const items = this.plot.selectAll('rect').data(bins)
 
@@ -531,7 +528,7 @@ class Histogram extends Visualization {
             .attr('transform', d => 'translate(' + x(d.x0) + ',' + y(d.length) + ')')
             .attr('width', d => x(d.x1) - x(d.x0))
             .attr('height', d => this.canvas.inner.height - y(d.length))
-            .style('fill', accentColor)
+            .style('fill', d => fill(d.x0))
 
         items.exit().remove()
 

src/rust/ide/view/graph-editor/src/builtin/visualization/java_script/scatterPlot.js

@@ -455,6 +455,9 @@ class ScatterPlot extends Visualization {
 
         let sizeScaleMultiplier = 100
 
+        let color = this.theme.get('accent')
+        let fillColor = `rgba(${color.red * 255},${color.green * 255},${color.blue * 255},0.8)`
+
         scatter
             .selectAll('dataPoint')
             .data(dataPoints)
@@ -468,7 +471,7 @@ class ScatterPlot extends Visualization {
                 'transform',
                 d => 'translate(' + scaleAndAxis.xScale(d.x) + ',' + scaleAndAxis.yScale(d.y) + ')'
             )
-            .style('fill', d => d.color ?? '#00000080')
+            .style('fill', d => d.color ?? fillColor)
 
         if (points.labels === VISIBLE_POINTS) {
             scatter