A nice addition to the color picker is the popup sliders for hue, saturation, light and colors. The screen capture below shows the slider for Hue active with the marker bar for present setting as a yellow vertical bar. You get the slider by clicking on the down arrow on the right end of each settings box. Then slide the vertical bar right or left to get your changes. Playing with these can be an easy way to *tweak* your colors to perfection.