fig.show()

The following example uses[cmid](https://plot.ly/python/reference/#scatter-marker-cmid) attribute to set the mid-point of the color domain by scaling[cmin](https://plot.ly/python/reference/#scatter-marker-cmin) and/or[cmax](https://plot.ly/python/reference/#scatter-marker-cmax) to be equidistant to this point. It only has impact when[marker.line.color](https://plot.ly/python/reference/#scattercarpet-marker-line-color) sets to a numerical array, and[marker.line.cauto](https://plot.ly/python/reference/#scattercarpet-marker-line-cauto) is`True`.The heatmap chart uses[zmid](https://plot.ly/python/reference/#heatmap-zmid) attribute to set the mid-point of the color domain by scaling[zmin](https://plot.ly/python/reference/#heatmap-zmin) and/or[zmax](https://plot.ly/python/reference/#heatmap-zmax) to be equidistant to this point.

The following example uses[marker.cmid](https://plot.ly/python/reference/#scatter-marker-cmid) attribute to set the mid-point of the color domain by scaling'cmin' and/or'cmax' to be equidistant to this point. It only has impact when[marker.color](https://plot.ly/python/reference/#scattercarpet-marker-line-color) sets to a numerical array, and'marker.cauto' is`True`.

import plotly.graph_objectsas go

import plotly.expressas px

fig= go.Figure()

fig.add_trace(go.Scatter(

y=[1,2,0,1],

y=list(range(-5,15)),

mode="markers",

marker={

"size":25,

"color": [1,4,8],

"cmid":0,

"colorbar": {

"len":0.5,

"y":1,

"yanchor":"top",

"title": {"text":"cmid=0","side":"right"}

}}))

marker={"size":25,"color":list(range(-10,10)),"cmid":0}))

fig.add_trace(go.Heatmap(

z=[[1,5,3,2], [5,3,7,9], [3,2,6,4]],

zmid=10,

colorbar={

"len":0.5,

"y":0.5,

"yanchor":"top",

"title": {"text":"zmid=10","side":"right"}

}))

fig.show()

The heatmap chart uses[marker.zmid](https://plot.ly/python/reference/#scatter-marker-zmid) attribute to set the mid-point of the color domain.

import plotly.graph_objectsas go

a=list(range(-15,5))

b=list(range(-10,10))

c=list(range(-5,15))

fig= go.Figure(go.Heatmap(

z=[a, b, c],

colorscale='RdBu',

zmid=0))

fig.show()