linear_cmap#
from numpy.random import standard_normal
from bokeh.plotting import figure, show
from bokeh.transform import linear_cmap
from bokeh.util.hex import hexbin
x = standard_normal(50000)
y = standard_normal(50000)
bins = hexbin(x, y, 0.1)
p = figure(tools="", match_aspect=True, background_fill_color='#440154')
p.grid.visible = False
p.hex_tile(q="q", r="r", size=0.1, line_color=None, source=bins,
fill_color=linear_cmap('counts', 'Viridis256', 0, max(bins.counts)))
show(p)