3D grid lines and tick labels colored by rgba color with full transparency

[jonmmease]

Uncovered by report plotly/plotly.py#1416

When a scatter3d marker has opacity set < 1, and the marker color is specified by an RGBA color with alpha < 1, the grid lines and tick labels take on the color of the marker. This leads to an odd appearance when the markers are mostly of fully transparent.

CodePen: https://codepen.io/jonmmease/pen/aXmpGX

var trace1 = {
  x: [0], 
  y: [0], 
  z: [0], 
  mode: 'markers',
  marker: {
    size: 200,
    color: 'rgb(255, 0, 0, 0)',
    line: {
    },
    // opacity: 1.0
    opacity: 0.999
  },
  type: 'scatter3d'
};

var data = [trace1];
var layout = {
      margin: {
        l: 0,
        r: 0,
        b: 0,
        t: 0
  }};
Plotly.newPlot('myDiv', data, layout, {showSendToCloud: true});

When the marker color is set as an RGB value, and the marker.opacity is set close to zero, the coloring of the grid lines and tick labels does not occur.

[archmoj]

Not only markers but also lines and errorbars have this issue. Here is a demo.