This example shows how to specify the color scale and color bar per trace. To share colorscale information in multiple subplots, you can use [coloraxis](https://plot.ly/javascript/reference/#scatter-marker-line-coloraxis).

Below we show how to set a reference coloraxis to a shared coloraxis, which are set in the layout. Note that multiple color scales can be linked to the same color.

import plotly.graph_objects as go

fig = make_subplots(1,2)

fig.add_trace(

go.Heatmap(x = [1, 2, 3, 4], z = [[1, 2, 3, 4], [4, -3, -1, 1]], coloraxis = "coloraxis"), 1,1)

fig.add_trace(

go.Heatmap(x = [3, 4, 5, 6], z = [[10, 2, 1, 0], [4, 3, 5, 6]], coloraxis = "coloraxis"),1,2)

fig.update_layout(coloraxis = {'colorscale':'jet'})

fig.show()