I can show you how to create a color picker in HTML. The HTML5 <input> element has a built-in type for color selection, which makes it easy to implement a color picker. Here's a simple example:

This HTML file includes:

1. An <input> element with type="color", which creates the color picker.
2. A <div> element to display the selected color.
3. A <span> element to show the hex value of the selected color.
4. Some basic CSS for styling.
5. JavaScript to update the color display and hex value when a new color is selected.

To trigger the color picker:

1. The color picker is automatically displayed when the user clicks on the input element.

2. You can also programmatically trigger the color picker by calling the click() method on the input element, like this:

   document.getElementById('colorPicker').click();

This example provides a simple way to implement a color picker in HTML. When the user selects a color, the square below the input will change to that color, and the hex value will be displayed.

Remember that the appearance of the color picker may vary depending on the browser and operating system being used.