Within the edit function of block.js

var el = wp.element.createElement,
    Fragment = wp.element.Fragment,
    registerBlockType = wp.blocks.registerBlockType,
    InspectorControls = wp.editor.InspectorControls,
    RadioControl = wp.components.RadioControl,
    ColorPicker = wp.components.ColorPicker;//this this

                el('div', {}, 'Menu Background'),
                el(ColorPicker, {
                    type: 'color',
                    color: menu_bg,
                    onChangeComplete: function(newValue) {
                        props.setAttributes({
                            menu_bg: newValue.hex
                        });
                    },
                    disableAlpha: true
                }),