colorpicker

from bokeh.layouts import column
from bokeh.models import ColorPicker
from bokeh.plotting import figure, show

plot = figure(x_range=(0, 1), y_range=(0, 1), width=350, height=350)
line = plot.line(x=(0,1), y=(0,1), color="black", line_width=4)

picker = ColorPicker(title="Line Color")
picker.js_link('color', line.glyph, 'line_color')

show(column(plot, picker))