<?xml version="1.0"?>
<form>
                <group>
                    <group>
                        <field name="start_hour" string="From" widget="float_time"/>
                        <field name="color" widget="color_picker"/>
                    </group>
                    <group>
                        <field name="end_hour" string="To" widget="float_time"/>
                    </group>
                </group>
            </form>
        