Implement a web app that can mix red, green and blue into any color like this example.
Add a header with three sliders (input with type range) The sliders will control the values for a rgb color (one slider for red, one slider for green, one slider for blue) Once a slider is moved the background color of the web app is updated Also show the color value in the header (can be in hex or as a rgb value like this rgb(xx,xx,xx)) Load a default color an the beginning (i.e. hotpink or dodgerblue)
Example range input. The value property sets the default value for the range input.